Root 3 CNC - Spindle Ground

Not sure why, but Chinese spindle manufacturer's seem to not be interested in connecting tool ground wires:



I am accepting this deficiency for now, and will revisit the problem at a future date.  The top of the spindle will need to be removed, and tapped for a ground screw.  A grounding wire will then need to be added from the aviation plug to the grounding screw.