Just finished installing the mirror I ordered for $40. Install was easy. Pop off rearview mounting plate cap and push tab / slide to remove. Installed new mirror. Pulled the map light and sunroof buttons / panel. Pulled wires through headliner.
Found switched 12v and ground for the sunroof connector. Tapped the wires, tested it all and reassembled. Installed the little trim piece that came with new mirror and tightened down set screw.
12v switched was solid black (bottom left in pic below). Ground was black & white stripe wire (top right).