I have a Hunter Cherubini 33 1980. Those raised portions of the deck... (circles, rectangles)... what's underneath? Seems like they are the perfect size for attaching winches and deck organizers for routing the lines back to the cockpit. I see from pictures that many have done this.What's underneath these? I'm hoping there are metal plates that I can drill and tap into and mount the hardware directly, without using backing plates from inside the cabin (and on the other side of the liner, which is more of a concern).Any help appreciated!Chris.....................