Step 14: Connecting the motor.
Since we want electricity to flow through the motor both forwards an backwards, we are going to want to attach one set of wires to the motor with the correct polarity and the other set of wires to the motor with a reversed polarity.
In other words, the black from one set gets paired with red from another set and then attached to the red wire on the motor. And the red from one set gets paired with the black from the other set and attached to the black wire on the motor.
Or to just see what is going on, just look carefully at the picture. It should make sense.