(the battery terminal)
If you notice, the rear end is bolted directly to the frame,no springs in the back. Thats how my father did it. He used large u bolts that were way to long, so had to use lots of washers to take up the threads. He must have run out of washers and when I was taking it apart I discovered a "Battery terminal" that he used as a spacer. I got a big kick out of it, so after rethreading the original u-bolts I cleaned up that "Battery terminal" and reinstalled it on one of the bolts. Now you know when you see it in one of the pictures. That battery terminal was as important as all the new parts I've bought.