Picture attached.
Ah, you tricked me and added more questions.

1. Battery is 6 volt.
2. The coil has a white dot (looks like manually painted-on white-out), beside the negative terminal.
3. Starter switch is on top of starter, no side terminal.
4. Ammeter? No, not to my knowledge.
5. Mechanical temp and oil pressure? I think so. E.g., oil pressure uses like a capillary tube or similar.
6. Number of wires on positive terminal of coil = 1.
7. Motor runs, starts fine. Recently adjusted idle and reconnected a vacuum hose that had been open to air for years, so she runs relatively very well. Timing's next!
Thanks.