Vegas2015

I have a 22 LTD, so not the new interior, and need help finding the backup camera wires in the cab. I upgraded the monitor and radio module to have wireless car play and factory navigation, but when I buttoned everything back up my camera isn't displaying at all. There were some unused wires at the radio module on the passenger side floor from the upgrade and I'm sure one of them is what I need to plug back in to have the camera work, but I have no idea what it looks like. Can anyone save me a bunch of time and contortion and just help me out? Thanks