Hello all, was working on my flooring in my 1998 Four Winns Vistsa when I discovered a cork that was in a hole at the back of my cabin below the entrance to the aft cabin. I assume it is for drainage into the bilge in the event there is water. I am not sure if the previous owner plugged it himself or not. Was just wondering if i should leave it in or not. I was thinking no, as i think the hole is there for drainage. And i also installed a new pump in the bilge last season to pump out water. I attached pics. Thanks all.