M_Boats: attaching transom ladder

Just got a transom ladder for my M-15. Obviously the transom needs some help to support the weight on the ladder without it ripping the transom off the boat. So how is this done. It seems impossible to get inside the transom from inside the boat to add some sort of weight distribution plate on the inside. And what about the outside. Does anyone add a weight distributing piece of wood, brass, bronze, metal, carbon fiber on the outside to support the ladder weight when used? Just wondering how to proceed.