I am trying to wire in my reverse light switch into my Keisler A41 4l60e transmission. I don't know where the factory wires are, or anything about where they go through the floor or dash to get to the trans. I removed my 727 a couple of years ago and it is long gone, so i don't have a reference. Is there a harness that I can buy, and if so, where does it connect to the main harness? Somewhere in the dash, or in the rear harness? Any help is appreciated.