Wood, Sorry for the delay. Got back late last night. The metal wall framing is screwed right to the top of the deck. The screws and frame are spaced in a couple of inches from the rub rail. I am probably stating the obvious, but the splashwell is molded into the top deck. The rear portion of the splashwell makes up the inner surface of the middle of the transom where the motor bolts to. Iooked inside and I see no floatation foam at all. it must be there but I can't see it. I spoke to Hurricane directly and they said the stringers are made of wood (bummer). I have uploaded a video hoping it shows how the metal wall framing is attached. I am open to ideas. fyi - I received final numbers from the insurance company, and I can pretty much replace this baby, motor and boat, for the money they are giving me. But I am still very interested in knowing your thoughts on the repair because I can purchase the boat, motor, and trailer for salvage cost and repair it and have some left over instead of buying a new boat. So depending on how much work this seems like it will be, I have an out. I am kind of a glutten for work and would find doing this repair very interesting but gotta weigh the options.
Also, I saw zero cracks on the transom outside or any connecting corners inside including along the sides and bottom, and also where the stringers tie into the transom on the inside. So I feel the fiberglass inside is all very structurally sound. The only crack as a result of the accident is the one shown on page one of this post and circled in red. The top of the transom shown there. looks worse than it is. rough plywood, but it is very solid. But, to my disappointment, I drilled holes from the inside into the transom, up about 4 inches, and the wood came out wet. It was yellow in color (no rot), but wet. I will attach a video right below showing how the top sides attach.