Another starting problem

Thanks to the guys who answered my query about IGN2. So, in a points car, IGN2 supplies the coil & starter relay, during cranking. Correct?
No.
The ignition switch Start terminal supplies power to trigger the starter relay.
Ignition 2 terminal supplies the coil.

Wire S2 (yellow) carries current to the relay.
Wire J3 (brown) carries current to the coil when the points are closed.
upload_2022-6-21_8-46-40.png
System voltage is noticibly drawn down when the starter engages.