Hello I am new to boating and this site I just purchased a used boat that has been sitting in storage for ten years I know not the best idea but I am very handy so I can work on it but the boat has a threaded hole about the same size as my drain plug in the bow of the boat just under the trailer hookup does anyone have any idea what it might be for? The original owner got ill and passed away so I have no way to ask what it was and getting info on this boat is not easy. Appreciate any insight on this.