I honestly don't know, but I wish to thank you for attempting to rectify the problem. I see it all the time and wonder how in the world people can see with their headlamps directed either up into the trees or straight down at the roadway.
If nothing else, stop at a dealer and a service tech should be able to show or tell you how to make the adjustments. Then all you need to do is wait till dark and find a building to park about 150ft or so from as a reference point to stern your aim.