[Lars Koster]

Are you refering to the center coffin well in the deck. If so the bottom of this is below the water line and gravity will not allow drainage. I have been fighting the livewell solution on my 76' Sceptre and started out with one inside the splash well in front of the outboard. The plumbing was easy in this location however it put too much weight in the aft and made the boat squat. now I bought a polyproplene (Aguaworld) live well that will stand up, on the deck, next to the fuel fill area behind my leaning post/seat on the port side. This unit will also double as a seat if needed. I ran a 3/4" hose from the transom to pump fresh water from the outside. The tank overflow will dump into the gutter drain, port side, and out the back scupper. Not my first choice but also don't want to drill holes in the side of the boat for overflow. This methood can only be acomplished if the fresh water input is metered so that the overflow/ gutter will not crest over.
Since I will not be turning over 100% of the water as fequently as needed to keep many live baits I have also put a re-circulating pump with oxygen infuser on the tank itself. The combo of these 2 should do the trick and the livewell itself is now portable. When not in use, the hose and power is tucked under the port gunnel, out of sight.
Let me know what you decide since this has been a challenge on a Sceptre.
My seating layout may be custom since I have alum. leaning posts/seats in front and todd helm chairs with arm rests behind them facing towards the stern on pedestals.