My son is trying to get his grandfathers old, 1977, Bayliner running. It has a Volvo Penta 120AQ B engine and outdrive. The wires for the starter / solenoid have been disconnected. Can anyone tell us how the wires are to be connected to the Solenoid? There are two threaded studs and two threaded rectangular blocks where screws attach. One block is higher than the other.