I see this asked time and time again, there is adjustment on the back of the unit its a white nylon hex head nut which will adjust aim. People confuse the self levelling part.
All self levelling does is dip the beam when you have some tubby hoe's in the back of the car or a boot full of luggage/drugs/cement. The self levelling uses an arm connected to the rear suspension which then dips the beam when the car is loaded up. Regular lamps have the roller wheel next to the steering wheel to dip the lamps down when the car is loaded. The actual aim of the beam still needs to be set the same as any other lamp, also if you lower the car it will confuse the self levelling and dip the beams so you need to have them adjusted when you fit springs or coilovers to aim the lamp back up.