Hi all, new poster but have checked out the site for last 2 years. I have an old 1988 Coleman Columbia that I'm restoring. I'm putting in a new converter (Parallex 6730). Shore power cord has a green ground wire that I'm pretty confident attaches to ground lug on converter. There is an old copper wire I assume is grounded to frame...does that too go into the lug with the green wire? Thanks and sorry for any repeated topics here...found a lot of interesting takes on grounding issues on this and other forums!