Today I pulled my boat form winter storage. It was taken a part and each hull was stored up side down. When I was rotating each hull to set it on the trailer I could hear something bang inside each hull. Next I checked two holes where bungee cable goes through hull for trapeze. I could not see all the way through. I’m suspecting that they broke and loose pieces make that noise while I was rotateing hulls.

Where is the best spot to cut inspection ports to see what is wrong ?
How can I fix broken tubes inside hulls for bungee cords?

Thanx

Kris