I don’t think taking the floor panels up will get you where you want to go. I had a similar Livewell on an older 22 tournament, and access to the connections was a pop out on the front of the helm passenger seat base. Are you able to check to see if your hose connections are leaking?
My live well is under the passenger helm seat there is a pop out there but it takes a mirror to see and with My short arms I can't reach it. It looks like the hose fittings is leaking by looking on the mirror.