Wiper motor connections

[Baby Blue 66]

I have completely rewired my truck (66 C-10) using the Classic Update kit, I'm now installing a re manufactured wiper motor and don't really have any clue what the connections are at the wiper motor. The original motor doesn't work any more because I tried to figure it out with the battery and some jumper wires. It is the 2 speed motor, with 4 terminals (technically only 3, 2 are shared). I know there should be a 12V power, and the 2 grounds coming from the switch. But, which wire connects to which terminal on the motor?