If your not sure you can disconect one of the wire at a time and see which one breaks the circut or the car won't start.
I do this with all my cars, then I look for the best place to hide the switch.
Everyone looks under the dash for a switch so try to think of some other place.
My favorite one was in a 69 buick I had, I has a plastic piece that was the size of a A/C vent that pop out.
It looked like it was solid but one day while puting in a stero I hit it from behind the dash and it came out.
That's where I put the switch, I had alot of friends in there looking for it and they could not find it.
Another good hiding place is under the ash tray.
Kurt