Tnx Great reading all of this info on grounding! As noted, the Alternator does not provide pure DC. Only when presented to the Battery, (acting as a giant smoothing capacitor) do the pulses become pure DC suitable for running sensitive electronics. Without these important heavy cables, clean connections, and a good battery, you invite trouble.
Update: Feb 3, 2024. replaced my body to transmission ground cable today, noted mild corrosion under the bolt attached to the body. Corrosion never a good thing, so cleaned everything up and ready to go in the spring.