My sender is from inline tube. When i ground the sender wire the gauge still doesnt go to full/move. Now, when i look at the back of the cluster...there is two studs for the amp gauge and then behind the fuel gauge there looks to be sutds with speed nuts. Does any sort or wires hook to these/the backside of the gauge? I know on my challenger there was some sort of light blue jumper harness i had to plug in for the fuel gauge to work.