Replacing the Battery Ground Wire

What happens here

After the initial failure to start, the creator postulates that the engine might not be properly grounded to the chassis. He heads to the parts store and returns with a new, heavy-gauge battery ground cable. He replaces the old ground wire, connecting one end to the negative terminal of the Interstate 6-volt battery and the other end directly to the starter's ground mounting point on the engine block. He uses an impact driver to tighten the connection at the engine block.

Goal: Improve engine grounding to ensure proper starter function