Repair of daggerboard

Hi all,

I have bought a beach catamaran that had a daggerboard in which a 5/16 hole has been drilled. The board protrude about 39 inches under the hull and the hole is at 10 inches under ther hull. The transverse location of the hole is at about the middle of the board. the maximum thickness of the profile is 1 inch.

The daggerboard is foam cored, The reinforcement is mainly uni carbon fiber, about 1/4 inch thick on each side of the foam where the hole is.

How would you repair that?

Thanks for your help.

AB