MarkT:
big BLDC motor with hall sensors.page 53 in
Hey - good catch - and looking at that connector, it's pretty clear that the three lower pins are for the windings, and the other pins (only some, likely?) are for the sensors. The picture of the motor, though, only seems to show the wires for the windings - plus a (black?) wire going off in the distance (?).
We definitely need more and better pictures - but yeah, this is a brushless motor.
...and the controller for it won't be cheap. While you might be able to get it to work in open loop mode (big if) - it won't have much start-up torque.