JBoone
If you take the headliner all the way down, you can pilot drill the wiring holes from the inside and then use the template on the outside. Makes for more accurate alignment. Also, for a place to tap, there is a plastic connecting block (mine was white) with ten wires running to it, hard by the steering column, black with orange tracer are the ones you want. I just popped off the back where the U-shaped spade connections are, and pressed another spade in there where it doesn't belong.
Jay