On my 2016 HD FW I notice what I thought was the battery tender cable dangling on the right side.
When I went to hook my charger I couldn't get a connection. I thought the tender cable was supposed to be behind the Left side cover. So I removed the cover and found the "real" tender cable and the charging was successful.
But what is the cable dangling on the right side? It wasn't behind the side cover and was actually partially melted from sitting on the exhaust pipe.
My HD dealer says "I don't know"