Ashtray button

I think the factory offset the lighter a bit simply to give it a better path by the trays bumper pad. Otherwise... collide with the tray, drop it, burn seat, carpet, console, hand, repeat.
Our first 67 notch back ( 40 years ago ) came with reverb unit wired to the radio. Its knob was added through the bezel beside the radio. I don't recall what it looked like or how many wires it had. I think it turned like a volume control.