Just crawled under my SV34. I don't see any ground wire like that exposed beneath the coach.... front or rear.
All of my AC wiring is in grey flexible conduit. The remaining wires are all 12V and I see no green gorund wires anywhere (just black or white for grounds / negative).
The only place I have seen that wire is in my electronics bay. I am very familair with it because I added a hardwired Progressive Industries EMS.
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