If you have a Gen I Regen controller you will not have a tow/run switch per say. The tow/run feature is built into the on off key switch. The wiring for this controller (Gen I) is different
than the one pictured. If your regen soleniod is wired without the resistor coil directly mounted on it (separate wires going to the coils) and if the controller main heavy wires are located around
the perimeter not on one end (like pictured) then you have a Gen I system.
Hope this helps.
(I have a Club Car gen I wiring diagram I can send you)