You can adjust them trial and error or use the info found in this thread Headlight Level
Let me know if you need any more information.
BTW, Found the picture below on eBay and I'm pretty sure that this is the headlamp you've got. The lights inside are one low beam, one highbeam and a side marker light. I can't remember whether this blinks when your turnsignal is on or not, but it's a light duty bulb, definitely not your DRLs.