Getting the wires into the doors was a pita. First set of boots were too short. I found longer ones.. Used 7/8 grommets from the local hardware store - worked out well. I was able to install these with the doors on! Placed the drill inside the door with a long extension. I will be removing doors when I paint next year. There are plenty of wires in there - although it may be maxed out. 1 pr 12ga speaker, 3 for mirrors, 2 for windows, one 10 ga. for door pop and one for courtesy light. All relays are under dash.