I don't know of where to find a wiring diagram, but wouldn't it work out to use a wiring harness from a power'ed seat? I am talking about the wiring harness that runs along the floorboard to the from of the car / dash. I was going to do this method when putting powered 9-3 seats into my NG before deciding to skin the seats and custom them myself. I have a wiring loom for the driver's side if you need it, but I am sure you could DIY some wires together and make it work with a proper diagram.
Best of luck.
Best of luck.