Relay is simple. I is +12v from ignition switch in start, G is ground from neutral safety. If you have both at the same time the relay transfers battery voltage to the starter solenoid.
This.
Do you have an automatic with at neutral safety switch?
Ground that terminal out.
Put 12 volts on the ignition terminal.
Either by your key switch or a jumper to be sure.
The relay should pull in. You may hear a click.
Then the two big terminals should pass 12 volts between them to the starter.
If you supplied power to your starter some other way and it turned over.
Look at these other basic items.
As stated, your "ignition" (sparking system) has nothing to do with the above.
