Alternator amp rating.

The actual electron flow is neg to pos. I often describe this as the "functional circuit path" meaning many people think in terms that "power is supplied from" Most/ nobody thinks in terms of "it is supplied from ground LOl
Yes, true about the electrons! Just easier for people to think of power flowing from high voltage than how the electrons actually move. LOL is right!
Maybe a bigger sin in that second diagram was not showing the grounds. After all, no circuit completes if it doesn't connect back!