Front Pannel Connectos To Motherboard_Positive and Negative?

Hi, i am building my New PC, and i have to connect the CASE Front Pannel Connectors to the Motherboard Front Panel Header.

All the cables are black, and only the POWER LED connectors are 2 separate cables each one  named as + Positive and - Negative... The other cables as POWER SWITCH, HARD DRIVE ACTIVITY LED, and RESET SWITCH are 2 Joint cables each and they dont show which side is the POSITIVE and which is the NEGATIVE...

The Case is a CORSAIR 350D. The Motherboard is a Gigabyte Z87MX-D3H

How can i find out which hole is the Positive and Negative on each cable? Does it really matter? What if i connect it Positive with Negative and vice versa?
Who is Participating?
Darr247Connect With a Mentor Commented:
On all the connectors you listed, the only one where it will make a difference is the LEDs...
on the switches there is no + and -... it just breaks the connection (usually on +, but not always).

If you plug in the LEDs backwards, they just won't light up... so if the Power and HDD LEDs don't light up when you turn on the power and the hard drive spins up (respectively), just switch those leads around.

You didn't include any picture, by the way... when you use the Attach File feature, you browse to and select the file, click Open, then you still have to click the Upload File button that appears on the right, below the Post Comment box, to complete the attachment process.
Ian MeredithConnect With a Mentor Commented:
You can reverse these without worrying about blowing anything up.

They will work in one direction and not work in the other.

Generally they all face the same way (label side away from motherboard).  If you find this is not right, reverse and power on again and guage result.
unrinoceronteAuthor Commented:
Thanks. I just noticed that the Double Connectors (POWER SWITCH, HARD DRIVE ACTIVITY LED, and RESET SWITCH) have a small TRIANGLE on the back, towards a side. Maybe this indicates the Positive or Negative? Which one will it be?

I am unable to find the 350D manual ONLINE (it did not came printed either). But i found the 800D manual, and there it says the following:
Pin 1 is indicated by a small arrow on the connector

What or which is PIN 1 then?

This is a Picture of my Case Connectors... (The small triangles are on the back, so they dont show in this image)
Train for your Pen Testing Engineer Certification

Enroll today in this bundle of courses to gain experience in the logistics of pen testing, Linux fundamentals, vulnerability assessments, detecting live systems, and more! This series, valued at $3,000, is free for Premium members, Team Accounts, and Qualified Experts.

JohnnyCanuckConnect With a Mentor Commented:
The power and reset connectors don't care which way they are connected.  The power LED and hard drive LED must be connected properly.  Just plug in the power switch lead and the reset switch lead and the power LED.  Turn on the computer, if the power LED comes on then great, orient the hard drive LED the same way.  If the power LED does not come on the switch the connector around and adjust the hard drive LED accordingly.
unrinoceronteAuthor Commented:
Sorry, here is the link to the CABLES PHOTO: 350d Case Front Panel Connectors

So i will do as you say, and i will connect them and test. IF they dont work, i just switch...
I was afraid i could damage the components if i connected them incorrectly...
Ian MeredithConnect With a Mentor Commented:
Yes, Pin 1 has the small triangle stamped on it.  It should be positive.

I have attached the front panel connection page from the motherboard manual. This is the proper wiring diagram for the front connectors.

You can download the whole manual here....
Ian MeredithCommented:
I have built over 50 systems and have used trial and error to get these front panel connections right.  

I have never damaged the motherboard or anything else for that matter by connecting these back to front.

Hope it helps
Often the best way to attach images here is so they display inline...  that's done with the Insert Image button on the editor's toolbar, by the way.
nobusConnect With a Mentor Commented:
to summarise :

>>  How can i find out which hole is the Positive and Negative on each cable?  <<  in the picture from Ian_admino all connectors are marked with + or - sign
>>   Does it really matter?   <<   yes, if a led connector is connected the wrong way around, it won't light up - for switches it does not matter at all
>>  What if i connect it Positive with Negative and vice versa?   << it wont light up, if it is a led cable
unrinoceronteAuthor Commented:
Thanks for all your help. I took all your advice and the front panel seems to be connected the right way.

I Can assure now that the small TRIANGLE on each cable means POSITIVE.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.