The location you are showing is the main chassis ground for the entire harness. You don't want to tie the Holley there, but rather to the chassis side (right side) of the inertia switch shown in the diagram you posted.
Papa, thanks for catching this, I didn’t notice the branch on that wire in the diagram. You’re correct the holley ground trigger should only be connected to the ground side (right) of the inertia switch.
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