Before I put the trim on I am checking positions for mounting the main control unit, I was it as far forward as possible so it is easily accessible. In my case I decided to mount all of the switches very close to the original winder hole (actually with one corner into the center of the hole). You coulkd try and cover the hole completely with the unit but I considered it not a very good idea having the wiring running into where the moving gears will be. Besides, the kit contains caps to cover the old hole in your trim.