MSD 8728 Soft Touch Rev Control Wiring?

Man, good call on the 12 volt power. I never even thought of the ballast. Quick question though, why would the green and white wires tied together at the negative side of the coil work the same as the violet rpm limiter wire to the distributor mag wire? I would rather do it the white to green wire way as to not splice into the distributor wire. Really curious what you saw to know that would work also. Thanks ahead of time. I am not the best with the electrical end of these cars yet. Always willing to learn and except knowledge.