On my 2004 Cedar Creek fifth wheel sometimes I have no 12 volt power except to the slide outs. I started checking and at the junction behind the battery there was no power on the bottom left stud. There was on the others. If i wiggle the stud the power returnes. Is there a reason this stud appears isolated from the others? It is not connected by a copper bar. Does this block have any other purpose other than connecting the leads? Does it sound like it is broken and losing contact? Shoul I replace it or just add a jumper to give it power from another stud?