Ok not sure how to explain this.

Power is supplied to my panotix ps22 by a 10/2. The hot wire is landed at the acc switch on my panel and comes and goes to the unit. And the ground wire caries through unbroken. On the ground lug of the acc switch is a ground wire that goes to a different battery. Its actually a bare wire that is twisted around a fastener for the panel grounding ro the frame. Will this cause a problem?

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