I think you are saying yours was the same as mine. "Coach" on the BIRD merges with the yellow wire from the same lug on the Iso Relay as the large wire to that leads back to the coach battery. But, yes. After the merging of the 2 yellow wires it leads to the Emergency Start switch on the dash. The picture of the merge is in my document. I added a picture showing the back of the switch on the dash.
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