I am trying to wire a harness from my truck to the trailer. I downloaded the wiring harness. There is a Red & black wire from the trailer. However the diagram does not show this wire, where does it go? There is a yellow wire in the diagram showing from the trailer but there is not one from the trailer. The diagram shows a green wire from the trailer and there is none, there is a green & white stripe from the trailer what is the green & white stripe wire & where does it go?