This boat of mine had a livewell in it, and I am taking it out for more room. I was wondering how would be the best way to plug up the holes in the back of the boat. It has the water in hole, water out hole, and the respirator pipe that sticks out the back of the boat. I'd like to keep them there in case I ever sell the boat and the person wants it back in. Anybody ever messed with this before?