repair replace hold down clamps

Hi,

I have 92' trailmanor 28, it is in really good shape for its age. The fastening bolts that hold down the clamps on the four corners have pulled out. The way this was mounted looks flimsy to me and i'd like to make the repair better than originally attached. I was wondering if anyone has done this and has pictures of the repair. I want it to look as good as possible.

Jason