You can use the UGC-2 grounding clips to eliminate the for grounding modules individually. This greatly reduces the number of costly grounding lugs and bare copper wire needed.
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UniRac CLICKSYS UGC-2 IC Grounding Clip, Qty. 1, 008000S-0050
Unirac Clicksys Ugc-2 Ic Grounding Clip, Qty. 1