You can run a 10 gauge charge line from the output of your alternator (marked Bat) through a fusible link (Napa has them made up with terminal end) then run it back to your battery in the storage box. This will keep the battery charged as you drive. The seven terminal trailer connector has a "charge line" built in.

Wanted Good Woman:
Must be able to cook , clean , sew , tune engines and polish trucks. Must have old Stovebolt and garage. Please send picture of old Stovebolt and garage.