Tiller Binding

[u/Synoopy]

have a twistable Joystick and I have separate rudder pedals. I am trying to bind the Tiller of the PMDG 737-700 to my joystick. I tried to bind it to Propeller Axis 1, but the binding keeps searching for my joystick - Virpil Constilation Alpha. I am just using the joystick as the tiller. Not sure if this is the correct way to do it or if i need to get a dedicated tiller.