Humminbird transom wire grommets

These are a set of grommets you can install into your boat's transom to seal the passage of the transducer cables. I found that a 5/8 drill bit was the perfect size to pass the connector through.
Simply drill your holes and run your cables, then you can install this grommet in two pieces after the fact with plenty of silicone/sealant of your choice.
The slotted grommet is excellent for passing multiple cables through if you choose to do so, for myself it worked to pass the power and transducer cables through the back-side of my dash.
Enjoy