A warning to anyone who might think this only takes 10 mins.. It seems simple on the surface but I can tell you from experience that it is not. It took me several hours to retrofit the wires, and that was with cutting them, running them, and resoldering them back together. Pulling the connector through without cutting the wires I imagine is even harder. I had to spray WD-40 down the mirror “harness hole” to keep the harness from ripping. The space is extremely tight and there’s a risk of ripping the connector off the wires, hence why I cut and resoldered. Then add the time of electrical taping it all back together and pulling it through the grommet while making sure you leave the correct amount of slack on both ends.
Remember that you can’t really drive the car with the door panel off and no mirror, especially the drivers side. If this is your only car then prepare to be out of commission while you finish the retrofit. I don’t wanna scare anyone away from doing it but you gotta be prepared.