You could connect two wires from the harness where the reverse switch normally plugs in. There are two bullet connectors that break out from your harness in the area of the clutch slave cylinder, on the right (passenger) side of the car.
Simply connect ANY switch between those two connectors. When the switch is closed, your lights will be on - open the switch, and they go off. It really is just that simple.
You could put the switch anywhere that you'd like in the cockpit and just flick it when you need reverse lights.
On their death bed, nobody ever said, "Gee I wish I'd spent more time at work!"
'68 Sprite 1275
'76 Midget 1500