The bottom socket is for the instrument light. No problem. The turn indicator ground strap screw was not tight. I am hoping after tightening it more, that will cure it. I think the extra ground is a good idea.

‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring
‘14 Big Horn, Quad Cab, 4x4, 1500