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Brushless motors are like 3 phase electric AC motors. The windings are connected in a "TRIANGLE". Picture the motor windings connected between each corner point. "A" wire on the top corner, "B" wire on the bottom right and "C" wire on the bottom left. The electric pulses out of the controller alternate pulsing to the motor wires in this order. a-b wires, b-c wires, c-a wires for each motor rotation. So if you swap "B" and "C" wires, it now reverses rotation around the triangle by going in this order. a-c, c-b and b-a. Therefore you cannot wire these motors up wrong, it only changes the direction of the rotation.
Hope that helps.
Hope that helps.
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