Power wire 1: Red  connect to positive pole +48V                   2: Black Connect to negative pole -48V Signal wire 1: Red 1st gear3000R/Min control wire                   2: Black  Common port                   3: Orange 3rd gear6000R/Min control wire                   4: Green 2nd gear 4000R/Min control wire                   5: NC Undefined                   6: NC Undefined Connect red and black is 1st gear Connect green and black is 2nd gear;       Connect orange and black is 3rd gear