For me and in order (please make sure to confirm with calibrations/stick/throttle used for you)
1. Fire (CCW to 0% E-Knob, CCW to 0% I-Knob, Clutch)
2. Engine (CW to 100% E-Knob, CW to 100% I-Knob, Clutch)
3. Prop (50% E-Knob, 100% I-Knob, Clutch)
I preset Fire inputs before the test started, pressed clutch as soon as "warning" was said on headset. From there I adjusted for Engine, and from there to Prop. Verbal cues are used and you have some time between to adjust as your flying.
You also have 2 gauges at the bottom right of your screen for High, Medium, Low. For Prop 50% on E-Knob, if your unsure, just look to hover medium.