Steinberg Systems SBS-LAB-101 Bedienungsanleitung Seite 15

Set the valve to the "stop" position. Tighten the connecting nut and make sure that the attachment is firm:
Dispenser on the bottle:
Screw in the dispenser. Hold the bottom of the bottle. Place the dispenser and bottle in an upright position.
Thread adapters are used to adapt the dispenser to different thread diameters of other bottles.