I have a cut off on the intake scoop where the bait pump pulls into the tank and on the exit I have brass through hull with thick hose and two clamps on both ends holding it together.
Holes in your boat are always a concern but really holes are not the problem poor connections, poor maintains, and bad bilge pumps are. I have one scoop, one transducer big football size hole, one drain for the boat and one for the live well now I am thinking about 2 underwater lights. Some boats look like a swish cheese now a days with all the stuff they are putting in them. O I forgot my ducer has a hole in it for the temp and MPR paddle as well Plus that hole in the front of the hull for the drain in that fish box.
FellowShip
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My motto: Just for the Grins