Are we talking about page 26-17 or 26-19 of the GL1800B/BD SM? No bike yet so can't go look.
Are you talking brake/combo or turn signal lights? What color wires were cut?
For the GL1800B IIAC = USA
Brakes: G/R = Brake, Br/W = Taillight, G = Ground...same for both bulbs.
Turn: Lb = Right, O = Left, G = Ground.