In StoreFront how to switch to Secondary Store that was setup

Hello.  Behind our Netscaler's, We have StoreFront 3.15 running on Windows 2012 R2 Servers.  This was setup with two stores, one to point to the XenApp 6.5 environment and one to point to the new XenApp 7.15 environment.  

So on the Netscaler, there was a new VIP configured for the secondary store.

The setup is nearly complete on the secondary (XenApp 7.15) environment and need to switch the main URL for StoreFront to the secondary store.  What are the steps to switch to not break the store setup and avoid or have minimal downtime during the switch.

I would assume I also need to update the Virtual Server in the Netscaler to point to the new farm.

In other words, for users, I don't want to give them a new URL space, I want them to continue using the same URL.

When this was originally configured, this was presented at some point we'd need to switch.

So just want to throw this out there to determine what the steps are.

Thanks in advance.