How do you interrupt these inverter "grounding" instructions....

[GimmyTree]

"Before using the inverter, please provide a ground connection wire. On the rear panel of the inverter is a terminal fitted with a nut for connecting to the inverter and to the earth terminal of the AC output socket. In a vehicle, connect the inverter to the chassis of the vehicle."

Here is the nut terminals on each side of the inverter...

AC Output:

https://imgur.com/a/98ZaAEf

DC Input:

https://imgur.com/a/9zn3zrQ


My questions are.....

What is considered the "rear panel" of the inverter?

My inverter has two earth terminals, one on each side of the inverter. Is the instruction manual saying to run a earth wire from one terminal to the other terminal on the inverter?, then run another earth wire to the chassis?

[rvpopeye]

That lug is a safety ground.
Connect to vehicle frame.
The second lug ? I'm guessing it's probably there for convenience.
You should only need one.

[B and C]

Pick one, they should be common inside the case. Use whichever one is easiest.

[Roadtripp]

Maybe put a ohm meter on them and see if they have continuity? I suspect they are connected and you can use either one of the equipment ground connections.