Sextant love

[electricdog.jg]

I have reveal a MacGregor 25, I have done a great job it look amazing. I have never sailed before I am almost ready to put it on the water but there is something I don't understand only the end of the bow is a drain hole about 2 inch diameter that goes down for the water to drain like rain or else dang on the back of the boat is another 2 inch hole I thinking those to shoot connect together somehow but I cannot picture how could I connect them don't send the water come into the boat from the ocean easy like some kind of box between the two pipes so the water won't come up please can anyone help me I have ideas but I like to know how it really works so I can finally golf saving ☺⛵