1969 Mercury Cougar 69 Xr7 Tach Ammeter Ignition Switch Pigtail Fried Replaced

I have a 69 Cougar XR7 with tach and ammeter. Ignition switch pigtail fried. I replaced the pigtail along with the switch. Kept original key tumbler. Car starts fine but not charging. Over the summer the pigtail fell apart on the voltage regulator, so I just wired the wires straight to it without the harness. Now saying all this I see that it has an orange wire to the F and green/red stripe to the A and yellow wire to the S. Am I correct. No wire to the I seeing that it doesn't come with an idiot light. Yellow wire is hot constantly. Jumped the Field wire while running and the volts go up. Nothing from the green/red striped wire though. Where does this run to and I am sure this needs to be hot.