Been awhile since I got rid of Jetovater sruff I had, but if I remember right, the handle had 5 notches in it, versus the 7 in a Place Diverter. No matter, what you want is the cable adjusted so while in the middle notch, the nozzle exit centerline is parallel with the pump shaft centerline. Eyeballing is good enough, since usually to go to either extreme of up or down, you normally have to "force" it a tad into those notches as you've reached the physical limits of the trim itself.

This is assuming your trim hasn't been heavily modified such as Brad's or Rivertards........

Ray