Msd pro billet install w Rev-n-nator

Saw that, but MSD shows specific =/- connections to their distributor. Is that the rotor phasing that is affected? I would have a 50/50% chance if I guess so it's not the end of the world. Distributor doesn't have the black wire, I would go with the orange as the + and see if that works correctly. Haven't been able to determine which wire is which on the harness looking at the wiring diagrams.