well my trailer that I just bought is all rigged up so I am re wiring it, I have the trailer stripped right now of the wires but my question is coming out of each drum there are two white wires, how do I wire these up?? which is positive and which is negative? Now that I think about it, is one of them for the electric brakes and the other for that TAP box ( the box that if the trailer comes unhooked the brakes lock up)? Where is the best place to get a nice heavy duty wiring kit for the trailer?? Thanks....