I didn't want to wait to the last minute for the wiring. It really can't be completed until the car is finished, but it's never too early to figure out how it's going to be laid out.
I had originally thought about putting the switches on the front of the seat frame, but came up with another idea. I made a small panel to mount behind the dash on the steering column drop. This puts the switches within easy reach and keeps them fairly well out of sight. Keeps them out of the weather too. I didn't like the look of the signal switch on the column so I made a mount that puts it under the dash with just a short section of the handle showing.