Where is the buick park avenue motor ground

Back track the black ground wire from the battery.....it should lead you to the engine ground.

Ok n this would b a different ground from the 1 running to the frame from the battery(u can see it on the pic to the left the small cable

So which one is ground? The short small one to the left or is it the other wire from negative terminal down by the radiator? I'm trying to do big 3 as well

Where is the ground for the frame located? I have a ground problem