i have 3 ESP guitars, 2 with duncan designed pickups, both are wired with green as lead and black as ground, i got an hb-103 duncan designed off ebay to put in the one that didnt have the dd's already in it, my question is..... the 2 with dd's already in them have green as lead, black as ground, but i was told that all duncan pickups are black as lead, green as ground, why would esp wire them opposite or do the duncan designed wire green -lead .. black - ground?