[fourwd1]

The pics and diagrams make it easy.
The heavy black wire now going to the resistor on the coil goes to the IG terminal on the Ign sw (according to the diagram).
That should go to the + side of the new coil.
The - side of the new coil should go to a black wire on the ignitor.
The new brown/red-black wire on the ignitor should also go to the + side of the new coil, as should the blue wire on the capacitor.

The "other" wire currently on the coil + terminal that you can't tell where it goes should be the one that in the diagram goes from the ST terminal on the Ign sw to the other (+ coil) side of the resistor.
From the 2 wiring diagrams it looks like you shouldn't need it any more, but I think you might.
The Ign sw in the points system provides 12V to the coil in the ST (start) position, then 12V thru the resistor in the IG (run) position.
If you look at the non-points system diagram there is 12V only in the IG (run) position. So how does the coil get 12V to fire up the motor in the ST position? My guess is it may the be the internal configuration of the switch. So if it won't fire up when cranking, that wire may need to be connected to the + coil terminal also.

As for the fuseable link, you may need to change that too.