I own a 2012 2520 XLD. The front bilge located in the cabin floor collects rain water from the anchor locker lid during rain storms. There is a sleeve at the rear of the front bilge area that seems to go nowhere. I assumed it was there to allow the water to drain to the rear bilge area thru the bottom of the hull. This does not happen and it appears to be blocked. Does anyone know if this is by design?