Yes you have it correct.
Use caution on this - disconnect the negative lead from your coach batteries before moving forward, and disconnect all 120VAC inputs.
I rerouted the red positive cable from the converter through the back of the converter / fuse hosing. That cable is only about 8” long, so I bought a 6 gauge battery cable with 3/8” terminal end to fasten to the battery in side of the relay. I cut off the lead battery terminal end, stripped about 3/4” inch of the covering and fastened together with the positive lead from the converter. Reconnect your negative coach batteries
Done!
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