Why not just turn the clamp 90 degrees so the cable insulation is over the hold down? It won't matter if the ground clamp touches anything. If the cable is too short to do that, use a longer cable.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!