Damn, looks good. I used to make the GP mirrors at a factory in Michigan. ( If you see a written 5 or 12 under the gasket, I made it) If you have a DMM, you can connect the original mirror, and test the wires to find out which wire controls which motion. The heaters typically have two wires that go the heater stuck on the back of the glass. Should just be a ground and +12v