Back up light wiring?

Yup. Unless someone has hacked 'em up they should be there. Just look in your manual, to see the wire colors and connector.

Where was the switch in your car, IE column, console, etc?

If it was column, here's from the 66 manual, yours is probably very similar

At the bottom of the wiper switch, "B1" takes off to the left of the drawing, and reappears on the one showing the bulkhead. You can see it coming in at the right of the page, right above the "ACCESSORY FEED" label, and goes down to the (column) switch connector. The dotted line going up and to the bulkhead connector represents a stick car wiring

From the switch connector, "B2" goes out off the right lower, comes back in on the first drawing, and comes in as the very bottom left wire on the second drawing. You can see it goes to terminal 4 of the rear harness connector.

The console cars essentially connect a separate harness into the same point as the column switch, but it's a different connector. The harness's are actually different because of console lighting, etc.