[rickst29]

I have three cables each on the the Inverter 12V-DC and Grounding terminals, with the Inverter terminals themselves being the 'bus connections' for the batteries. My Inverters terminal lugs were tall enough to support this scheme.

On the 12v side, two battery cables with 200A fuses at the batteries (they are expensive fast-blow "class J" fuses, protecting each pack from a short circuit) connect to the terminal post as a "bus bar". These are big wires, AWG-00, rated with roughly the same transmission capacity as the fuses (although the short wire lengths could have them interpreted as chassis wiring. The 3rd wire, AWG-1, goes into a bus connector where smaller wires go to a few other places (8-AWG from solar controller, 6 AWG going through liquiditite conduit under the trailer body to reach the load center and the power converter, and an AWG-10 connector into a 5-way WAGO connector for other small things (an external 12v power port, the battery heater pads, and the 12v power wires to the coulomb counters and a couple of relays doing other things.

On the grounding side, its nearly the same - but without fuses. The AWG-00 wires come in from the coulomb counter shunts, the coulomb counter shunts connect to the BMS units, and the BMS units connect the battery '-' terminals.