There is something wrong for sure, you should have a fitting on any whole on your boat. As you can notice in the first pic, the core material of your hull is exposed, this is bad to say the least! From the looks of it, I guess the fitting is broken (you can see a black rim inside which is a pasrt of the lost fitting). You have to solve that before you put your boat back to water, it has to be sealed and installed properly so you do not soak the core material or let the water reach where it should not. The other side should also be checked and have a proper seacock.