Wiring Diagram - Side Camera Trigger Wire

I added the Furrion side cameras, I was able to locate the brown trigger wire for the passengers side turn signal to activate the camera (the wire was tied into the Lipper control box). The drivers side wire is red at the hitch, I have looked everywhere and cannot find a red wire (or any other color for that matter) it to trigger the drivers side turn signal. Anyone have any thoughts of where to look? Durango Gold R360REQ, I would assume most models travel the same path for wiring but that is a guess...lol 

Thank You