I was contemplating putting in the Overhead Console. Mine didn't come with one. A couple of questions. Does anyone know where the wiring harness goes too on the ones that have it? Does it go directly to a connector, or is this an unplug from one truck and plug into another situation? Would this work on a truck that it didn't come on, by just swapping the needed harness wires and installing the overhead? I have one I can get at a junk yard, but don't want to spend the money unless I know it will work when finished.