The missing bit could be the motion bracket.
I would disconnect the motor and the tender, put a meter to the motor wires and see if you get a circuit, if no, reconnect the tender and repeat the test, if you still don't get a circuit, you don't have a short. Next, connect the meter to one of the motor wires and connect to one of the pickups, do you have a circuit? No, try the other side pickups. Still no! Repeat for the other motor wire. If you're not getting circuits, then the wires have a break in one or the other or both. Whilst the motor is out, put power to it. You will now know where the problem lies, if any.