To our delight Go Power is standardizing many of their rv solar kits and cable entry plates with color coded wiring. This allows for an easier setup once you are down in the RV installing your charge controller.
In this setup Array Positive in your PWM solar Controller would be the Red Cable and Array Negative would be your Black Cable.
This only work is your kit and cable entry plate has been ordered with the new color coded standard cables. Ask your sales rep at Outside Supply about color coded MC4 cables when purchasing your solar kit for your RV.