If you bolt the relay to the frame somewhere you don't need the green/red wire, otherwise it goes to the relay base (like you said). Battery and starter on whichever of the two big posts most convenient. Doesn't matter. It's just a switch contact between the two.
In the native application the "I" terminal is a third contact in the main switch contacts between battery and starter. It is is intended to feed full battery voltage to the ignition coil while cranking, bypassing the ballast resistor when you energize the relay but isolating the coil back to the ballast resistor otherwise. You could connect an idiot light to that showing when the relay is energized....
In the native application the "I" terminal is a third contact in the main switch contacts between battery and starter. It is is intended to feed full battery voltage to the ignition coil while cranking, bypassing the ballast resistor when you energize the relay but isolating the coil back to the ballast resistor otherwise. You could connect an idiot light to that showing when the relay is energized....
