Help with pinout for servo motor

I've got a couple salvage servo motors pulled from a large plotter. There's a 10 pin ribbon cable and two large power leads for each motor.. Is there any "standard method" for determining what the 10 pin cable pinout is?

If it helps.. the motors are made by IMB subsidary "Universal Magenets Corp" and have the following numbers 10211-301-001 2139?020 86

thanks

- jim