Not factory and looks like someone added a Bass Boat style upgrade to the live well or it’s remote hull drain control. Which I suspect is not also Saltwater rated.
Can you pull it forward some and grab a OEM name or P/N off of it? Zooming in provided neither…
I have seen those before, just not on a Triumph Boat. Does not mean we cannot find a replacement, just need more to go on for a deeper search.
Thanks!