It shouldn't matter.... the service manual lists them all as the same color wire into the regulator... and being that it's AC current coming out of the stator, it won't have polarity. One of those wires does T off to the headlight relay to latch it on once it's running, but it doesn't matte which one.
What's more disturbing is that the service manual lists them all as BLACK wires, so I have no idea in hell why you would have orange and red wires there??? did someone do some sort of splice repair on that harness?
Attack life... it's going to kill you anyway.