You need to activate the onboard 6/2 valve to switch the oil from orbitrol to autosteer valve.
With the latest INO sketch from Brian you can use the unconnected RPWM pin when using a Cytron to toggle a relais. In the arduino config you can select which type of relais you have. (High or low active).
When using an IBT you already have a enable pin used to the IBT motor controller, which also can be used with a High Active Relais to turn on the 6/2 valve