Attach the thumbwheel to the receiver AUX port with the slave cable.
The thumbwheel should now auto detect and work, if not you will need to set up the AUX port.
Click / MENU / AUX / MODE / select KNOB
Now select what axis motor class you want to control with the thumbwheel, example for focus.
Click / MENU / AUX / AXIS / select FOCUS
Please Note: Turn off the AUX port before you disconnect the thumbwheel slave cable or when not used as the system may pick up noise on the line which in turn could move the motor in an unpredictable fashion.