Put on my diagram of how some 7-pin junction boxes are wired.
Copied & added some text to up your SmartDraw drawing. I was thinking the RED going to the 30A CB on right side may be paired with the RED-BLK wire at frame ground to unknown, maybe schwintek or solar port, or a jack?
Splicing the shore power10/2 w ground to the wire/cord you run to the Multiplus could be a set screw splice or some type.
Gardner Bender Butt Splice Wire Connectors Model #HST-1300
https://www.lowes.com/pd/Gardner-Ben...ors/1000797068
Ideal 30-1294G Mechanical Conn, Set Screw, 10-18 Awg, Pk10
https://www.amazon.com/Mechanical-Co...dp/B000LEZGEK/
TT - 7-Pin Junction Box -1.pdf
Copied & added some text to up your SmartDraw drawing. I was thinking the RED going to the 30A CB on right side may be paired with the RED-BLK wire at frame ground to unknown, maybe schwintek or solar port, or a jack?
Splicing the shore power10/2 w ground to the wire/cord you run to the Multiplus could be a set screw splice or some type.
Gardner Bender Butt Splice Wire Connectors Model #HST-1300
https://www.lowes.com/pd/Gardner-Ben...ors/1000797068
Ideal 30-1294G Mechanical Conn, Set Screw, 10-18 Awg, Pk10
https://www.amazon.com/Mechanical-Co...dp/B000LEZGEK/
TT - 7-Pin Junction Box -1.pdf
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