Re: 3208 cat
If you disconnect the (+) post on the Battery,+ put a Test Light between the Battery,+ the Wire End you just Removed,......
I'm Guessing that it'll be Lit, indicating a parasitic draw......
Then you'll have to start Disconnecting various Systems from the system till you Find the circuit that is drawing down your Batteries..........
It Could be Anything from the Alt., to a Bilge Pump,.....
As with chasing Any Electrical Gremlins,..........
Follow the Power............