I hate these back up lights! A lot of money & trouble. When I replaced the valance on my 69 I left them off since the AMD part wasn’t drilled for them. I put an led light strip over the license plate for backup light. Works great since mine is a driver, not a restoration.
Probably looks cleaner on that 69 without them. Replacing the valance on my sons 69 as well. Will keep old one for a hole template, but may do the LED deal you did instead. Got a pic?