Question: LH tail light ground

I have this ground loop. There is a small hole in the supporting lip for the trunk board, this hole is threaded for a speed screw (J screw?) is this where it goes. does the ring go on the underside to avoid interference with the floor board?



I could be wrong, but I grounded mine here.

Rick OBrien
65 FHC in FL

Probably doesn’t matter a great deal where …. So long as it is grounded