Wiper motor or 65 C10

[Bulldoser65]

Seems the switch is missing from the back of the turn knob.

I am going to just wire up a toggle switch so I can get it working, so I can have wipers when Im driving in the rain.

The wires going to the wiper motor are Yellow and Blue. Which one is the ground and which one is the power, so I know which ones to tap into for the toggle switch.

Was out working on it right now, but didnt want to test it out without knowing.

Thanks,
John