Does any one happen to know the color code of the charge wire that goes to the hitch plug? I know, I know, I could cut into the loom at the plug, but I need to tap it between the bed and the cab and would like to do only one "exploratory" cut. This is for my '99.

Also, this slide in I bought has an Optima Red Top in it. Are these acceptable for use as an RV battery?