Set timing, hei mod

Yes, of course the negative side,, thats how its connected today. I just think a bit wrong there.

I will need the tach signal to trigger megasquirt thou.

I will need to make a new ignition cable between coil and cap. But I can only find connector on coilside With 1k Ohm resistance. (Not many places open on Saturday). Don’t know what’s the normal. Can I use that one?