Hi folks. This is my first post. I am new to cat and I have started the journey with a P16. I am still sorting out all the gegaws that came with the boat and the step hinge has me confused. I think I may have too many parts. And the manual is unclear about it. I seem to have all the parts of a step hinge system attached to the boat. Meanwhile there is a cup for the 1/2 ball at the bottom of the mast. Here are the pics:

The full monty on the boat:




With the cup on the ball:



And the mast with the seemingly redundant cup.



Do I have an extra part? The part on the mast has no flange for the stepper hinge. What am I missing here? Thnaks in advance.

Christian