I have just had a look at the Haynes manual, three cables come out of the alternator, they seem AC, so they should be fine no matter the order, I have not have a look at the connector on the bike, but it seems that there may be a 5 cables connector to the regulator, so in that connector the red and black ones should be taken care as they are 12V DC (+12V and ground), and those two are to be sorted correctly for sure.
Haynes just seems to put the three coming out of the regulator as white or grey on the schema, not even considering them important.