Got holes all In mine from bolting stuff to it. Never had a problem . Tiny drips here and there maybe and just flip it over when I get back and drain it out. Condensation puts more water in mine than random holes .
The transducer came with screws and a stand to screw into a surface and the scotty transducer mount comes with many small holes that will fit many types of mounts. Also I can’t remember what size bolt it was I had to take the mount to Home Depot to see what would fit best.