The wire at the amp is a lite green with a white tracer, just spice into it, the book calls it a dark green it isn't. And as you look down at the amp the wire is to the left side of the connector. As far as the nav unit connection i didn't have any luck finding a stock wire terminal, i did find a small female spade connector and drill out the harness connector for the nav unit, so it would fit through. And lastly don't worry about the rev wire is not really needed unless you need to have navigation in rev. mine works fine with out it.