The LH battery is your CHASSIS battery
The middle battery is your HOUSE (Auxiliary) battery and is connected in parallel to the RH (Upper) battery. You don't need this third battery - it just supplies more stored energy for your house loads - but don't connect the leads that go from it to the middle battery if not using it - the dangling red lead will be hot and could short out.
The lead from the hydraulic pump goes to the POSITIVE post of your Auxiliary battery to power the hydraulic system (levelers and maybe slides).
You had it pretty much figured out except for the third battery.
Right now both your chassis and house loads are coming off your single (dead) battery.
The video helped a lot!
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Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
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2024 Chevrolet Trax 2RS - Soon 2B TOAD
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