#1 I remember my past TT the battery was stored in an inclosed compartment in the camper, the battery it's self was in an water tight case with cover. The cover top had a flexible hose that connected to a external vent on the camper, maybe yours is similar?
(this was to vent battery fumes to the outside of the camper)
#2 my fresh water tank has a drain hose and a high point air vent hose for water to exit when filling
Mke
2022 F-150 3.5 EcoBoost 4X4 Supercrew GCWR 19,500 157WB
Payload 2476 Maxtow 13,800 3.73 Equalizer 4 Pt Sway Hitch
2017 Jayco Jay Flight 24RBS
Old TV, 07 Toyota Tacoma, Double Cab, Factory Tow Pkg, retired towing at 229K. (Son now owns truck)