Okay, so I go out to mock it all up before cutting and discover that the cables as currently routed are not long enough to reach the inner door panel. They are currently running from the mirror down through a hole in a stock-looking bracket bolted to the inside front vertical edge of the actual door. The bracket is pointing downward with the hole located approximately mid-door. With the cable routed through it, there is not enough slack to route it back up to the correct location on the inside door panel. It does look like the bracket could be rotated 180 degrees to point upwards instead. That might provide the needed slack. Can anyone confirm the correct cable routing and bracket placement?