Hide and seek
First, find the leak and then we can discuss how to fix it, right?
Remove any panels or anything you can to get a better look. Then one person, outside with a hose and one person inside with a flashlight. "Seek and ye shall find," (hopefully).
Start, with the water hose low and work your way back and forth and then up and down. The leak may be in the suspected area or across town someplace and only showing up at your nav station. The only thing you can rely on is, that water runs downhill, (usually).
Relax, all boats leak here and there... I guess you just have to go with the flow, chew gum and patch it up. You know, most people think small boat owners are crazy... They prefer to stay ashore, walk on the beach and complain about sand in their shoes.
Good luck and maybe someone else can tell you precisely where to look.
P.S. (Boat owners are crazy.)