I find it very confusing that the coils are labelled 2B,2A,1A,1B on the Duet Drive outputs when the motor specifications use A, B, not A, not B for the coils. Specifically, 2B and 2A are on one coil while 1A and 1B are on the other. I was reading it for quite a while as 1A and 2A as the same coil, could somebody tell me why you use this nomenclature on the hardware drawing?