I recently fell into a 1995 sun tracker bass buggy 18 pontoon. I've always been a bass boat guy so this is a new world to me. My son decided this would be a fun project to take on. Little does he know this is always a slipper slope. Anyway, On the front of each log there is a hole on the top on each side. It is not threaded nor was there any plug in the hole. Does anyone know if this is a vent hole of some sort? Is this something in the design from sun tracker? The hole is under the deck (which has not been replaced) so I don't see how someone could have drilled these in the tops of the logs and they looked milled or done in the factory. Any help on this would be appreciated.