[spdbrake]

Your factory headlights are Hella with internal parking lamps correct? and not the newer Transformer or Insectoid Led?
If so there is a locator bump on the back of the housing that mates to notch in the housing bucket to ensure correct clocking of the light housing.
The Hella are manualy aimed so that the Left (drivers) is pointing slightly to the right (for oncoming traffic) and the Right (passenger) straight on.
Mine were Driver's, pointing down-left, and Passenger's, pointing up right when I purchased my car used.
I've since swapped out to some Lucas Tri-bar replicas.