I have just bought a Spyke starter for a Shovel FXWG.  It has a lead coming out of the starter with a connector and two bolts on either side of the rear.

When connecting the lead to the postive on the battery - the starter spins constantly. (The same happens on the positive of the solenoid).

Does anyone know how to connect one of these Spyke starters up? Cheers.