Looks like a slip ring motor perhaps? I have never dealt with one. With that said, it looks to be wired between the two connection points already?
I would have fun with an ohmmeter and a notepad for sure.
Here is SMA's contact info, Phone, and E-mail address. Possibly SMA has wiring diagrams for this type of motor.first, I might call "S.M.A. Industrial Services Ltd" and pick their brains about it.
The one on the left is the power feed. The one on the right is the slip rings and you have to put external resistance across them to control the speed of the motor, from what I am understanding.
It appears that the slip rings are 3-phase, 1 phase bare, 1 marked yellow, 1 marked blue. If so, this could be a wound-rotor motor, with a rotor having a coil fed by slip rings (instead of the usual induced-current rotor). The speed of a wound-rotor motor can be changed by changing the resistance between A-B, B-C and C-A of the wound rotor leads. Before electronic VFDs, wound rotor motors were used in cranes and other large loads.The one on the right is the slip rings and you have to put external resistance across them to control the speed of the motor, from what I am understanding.