Kevin, the back of the switch in my 2013 VS looks kinda like this:
There are FOUR terminals (only three show clearly in this photo)
- The top terminal has the heavy red wire from the battery (and another red wire, too)
- The terminal towards the passenger side has a black wire that goes to the coil.
- The terminal towards the driver's side has no wires connected (it's the 'accessory' terminal). If you've got some electrical accessories that come on when the ignition is on, you may have a wire or two connected to that terminal, but my car came from VS with nothing hooked up there.
- The terminal in the middle (positioned higher than the other three) has a smaller gauge red wire that goes to the solenoid (for starting the car).
And oh, the nuts are 9mm.