+1 on Jake's solution.

I visited the Stilletto yard and they were doing an extensive retrofit of a 28 footer. I peeked in the hull near the main chainplate, and they had the same sort of deal going with the metal plate and carbon / kevlar roving (or webbing) put through the holes in the plate, and then fanned out and laminated to the hull at various lengths along what I presumed to be the load path(s).

The whole assembly was then sandwiched in another few layers of glass against the bracket and hull.

I would presume you need to be careful to avoid sharp edges/corners in the bracket to avoid chafe should that thing ever jiggle with expansion or cyclic loading?