Battery in trunk. Ford Solenoid in trunk. My Ford Solenoid does NOT have an "I" terminal...only a single "S" terminal, and an in and out for the big starter wire...

Most instructions I've found on line say the wire (purple I think?) from the "s" terminal of the Delco solenoid should go to the "s" terminal of the new Ford solenoid. This I can do...

Other instructions I've found say I also need to run the yellow wire that was at the "R" terminal of the Delco solenoid to the "i" terminal of the Ford Solenoid...

This is not so easy, since my Ford Solenoid doesn't have an "i" terminal. Can this "R" wire be run somewhere else? Or do I need to get a different Ford solenoid??

What am I missing here...

If it matters, I'm pulling my points/condensor system and installing a Pertronix unit in the distributor at the same time...

I know this yellow wire all has something to do with the ballast resistor, but not sure exactly where to go with that yellow wire. Does it do me any good to leave it right there on the R terminal of the Delco solenoid?

I'm a little confused as you can tell....

Thanks to anyone who can provide me some direction!