68 Dart - Where is my Backup Light Switch?

On a 68 Dart, is the backup light switch inside the car mounted at the bottom of the steering column right before the firewall? Or would that be the neutral safety switch.

Problem is I have no backup lights, which I expected since I switched from column shift to an aftermarket floor shifter. Just trying to figure out where to pick up the wires from the old back up light switch so I can wire up a switch mounted to the new floor shifter.

Car is a 68, engine 71, and auto trans is a 74. Neutral safety system is working fine, I think I wired that up to the 74 trans when I installed it.

Any ideas?