It's honestly kind of a pain. You have to take the mirrors off and apart, while also removing the door panel. Then you have to cut off the Rigid Deustch connector so that you can route the wiring through the door grommet. With the mirror apart, you'll need to find a new bolt and nut and find a place to mount the lights on the mirrors so that they stay. You'll also likely need to add some silicone or other bonding agent to the mirror seam, since they never go back together quite as firmly as they came from the factory. Then you have to tie the wiring into a switch and find a good ground before putting everything back together.