ashe fx1500

I am looking help with wiring a ASHE FX1500 spindle controller, It controls a SEM 130v motor and I am trying to avoid changing it as there could be problems with mounting on mill etc.
I would have liked to control the motor via MACH3 but running it manually would do for now.
I believe all I have to do is connect a 30K potentiometer across pins 1,2 & 3. I would like to know
if this is right. Pin 1 has 12v on it.
Jim

The Ashe Controls Fx 1500 requires a 10k Pot , Terminals 1 , 2 & 3 , 3 being the wiper , A switch will be needed between 4 & 5 To activate , Works fine manually this way