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JBL S36 II  Speakers connect to the music source

I have these JBL S36 II 6" Wall-Mountable 3-Way Speakers with RCA gold plated connectors.  

What's what's the best quick and dirty way to connect then to the music source?   Which is desktop or laptop as a music source.
Any idea appreciated.
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Most Valuable Expert 2013
Commented:
Quick and dirty fix
A 3.5mm stereo jack to RCA cable
eg: https://www.amazon.com/AmazonBasics-3-5mm-2-Male-Adapter-Stereo/dp/B01D5H8JW0
(check the length you need this one only allows you to place the speakers 4ft from the laptop.

Your speakers are passive with 8 Ohm impedance so you could improve on this later by adding further amplification between laptop and speakers but the laptop has a basic amplifier circuit built in which is useful because otherwise using an unamplified source with passive speakers can damage your source
https://myaudiolover.com/power-passive-speaker-without-an-amp/

So just buy a cable as a "first fix".