I think my Giggy box is a bit different, but it could be mounted upright rather then length wise. You are correct, no hydraulics. And yes the MPPT and SmartShunt is still active. I realize 4 watts is not much but that adds up to 96 watts a day or 8 amps in 24 hours.
I'm hesitant to disconnect the battery completely without having a solar disconnect in place. This might be my next move!
2022 Montana High Country 295RL, 400i, 2x DragonFly LiFePO4 batts.
2022 GMC 3500 HD + Andersen Ultimate Gooseball hitch