mrfixit
Chief Chaotic Engineer
If that screw has any type of coating at all (such as a self-drilling screw) it may be insulated from the hole.
That would be better if you wire-brushed the flange to clean metal, then used a small bolt, nut, and solderless connector on the wire with a loop or fork end.
That would be better if you wire-brushed the flange to clean metal, then used a small bolt, nut, and solderless connector on the wire with a loop or fork end.