Changed starter, hooked up battery, car jumped forward.

I think its a bad starter. The solenoid has three connections.

A blade for a small black wire, and two studs, one has a wire going from the solenoid to the starter, and the other has nothing. I put the pig power wire on the open stud, and the blad connector on the blade, and when I hook the battery up, it starts.
 
Ill take some pics of them tomorrow. Im pretty sure I can fix them with a hammer, but I would probably feel a little uncomfortable under the car with them after that.