Hello,
This is the first Modern Fiberglass V hull boat I've owned, Previously owned boats did no have live wells. This boat has a fore and aft live well, both have overflow stand pipes. The fore well looks to be about 10 gallon and the rear I would guess around 15-20 gallon.
I can see the pump with the screen is piped (hoses) to both live wells. The only switch I see says Aerator and its on the fore deck control panel. There are NO valves any where in the piping. Can someone maybe offer so in-site as to how to operate/ fill and in this case I must assume since there are no valves, the aerator pump is the fill/recirculate pumps. (lake water pumped in and the tank water over the top of the drain pipe and back into the lake).

Am I correct, I should insert the stand over flow pipes in there live well drains use the Aerator switch to fill the wells, periodically turn on the Aerator switch to keep the water fresh" Is that it?