These picuters show the inside of a cabinet an Embossed White Family Rotary came in - to show how the controller works with the knee bar
The controller is mounted to the bottom back side of the machine tray, so it folds down with the machine.
When you open the lid, the cable lifts the machine into place
The controller "catches" the knee bar and engages.
when fully open, the controller clips into the knee bar, and causes it to extend out from the side of the cabinet - and when you push the bar towards the cabinet, it powers the machine.