I need help with the reverse lights.

You are probably missing the "reverse indicator pin" that fits into the column and moves the switch.
Attached is a photo:
On the right is the original pin that eventually broke off.
Notice there is no prongs remaining on the bottom.
On the left was a part that I bought using the part number shown.

My recollection is that I got that part number from a '67 Parts Books at the dealer. For the part itself I called around until I found someone who had one, and that's what I got.

Maybe its not the right part, but it looks close. Maybe its a superceded replacement item.Obviously the extra length would have to be cut down to make it work.

View attachment revs-pin.jpg