I can get you some pictures of my Bravo in the next day or so. The piece with the 4 small holes and the large hole in the middle is where a little ball mounts that holds the mast in place, the section to the left of the picture is where the front leg of the tripod mounts.
I know nothing about repairing these things, but I do know that the part that you're showing is pretty important.
The tripod on the Bravo has
to be secure in order to sail. If you can't get it just right, you're going to have big problems. Anything from the mast falling down, to the boat breaking and sinking, likely both, are real possibilities. I would get a few opinions from Hobie Cat, or a local dealer before doing the wrong type of repair.
I found this picture online, it's not a close up of the parts that you want to see, but it does show the little ball, and the tripod.