Squareback Connection to Electronic VR

Have and electronic regulator. Plug is triangular.
Triangular plug has white and green wire. White wire goes to F post, green wire to I post. Black wire from field terminal runs beside blue wire and is spliced where they are both connected to green wire. Blue wire is cut about six inches from alternator. Black wire is taking place of blue wire. The blue wire is just a dead wire now.
Plan on unwrapping entire harness this afternoon, but so far I have not been able to find a wire that goes to a switch on power source.
Car came with Chrysler electronic ignition, Chrysler electronic VR, and the newer alternator.