There is a bolt under the headlight that does position the entire unit. I replaced the complete headlight some years back and remember loosening that bolt before I could remove the headlight. How much adjustment is in the bolt I can not be certain. Best way to get at that area is to completely remove the fender plastic liner with the small door that allows access to the fog light. With that out of there you can see what you are doing. It is not absolutely necessary to get to that bolt to remove the fender liner, but does make it easier to work with the headlight.
To adjust the up/down of the headlight you use the center adjustment screw ( between the two bulbs), clockwise is down.
Good Luck!