Hello Sweeney, we met at the Camp-Inn gathering last year. Hope all is well. Thank you for responding. Yes, the plug on the side. The plug was spinning, so pulled the battery out to get to the back side. The lock nut was a little loose allowing the plug to spin. I was able to get it. Something I noticed when doing this, I am always careful when working on anything electrical. After removing the plug, I thought how can this plug not have juice coming from the solar panels? So, placed and voltage meter on the plug and it was hot. If anyone is working on this type of plug, I would recommend removing the fuse before messing with it. Kind of strikes me as a hazard. Thinking at some point I may change the 3-prong style plug. For now, the fuse comes out.