The 7way plug on my 2017 35'? Grand design travel trailer had some wear and gave "trailer disconnected" signals on dash. I purchased a GM recommended male plug (Pollak). The old connector is molded together so I am unable to see how colored wires connected to male 7-way plug. I even hack sawed old plug and still not able to see the colored wire connections. The Pollack plug has wire color suggestions on it. The colors seem to hold out, match with yellow left over to go to center (auxiliary). Does anyone know the proper color wires to 7 way male plug?