Your only option, without specs, is a DVM. Find the four motor windings by finding continuity between four sets. There should only be the same value of low impedance or low resistance between the two wires that make up one half of each winding. Of these four circuits there should be a center point ( zero resistance ) of two that is the center tap of each of the two windings the motor is made of. At least with these established you can start. Otherwise your in the dark and dont stand a chance, unless someone can find a similar wiring diagram for the same manufacturer, although at this point we dont even know what make the motor is.
Good luck. Ever go snipe hunting?
Halfnutz
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)