The two bolts on the bottom are mounting bolts that go through an adjustable collar to snug fit to the bracket before tightening. Those aren't intended for aiming but the adjustable collars make sure you don't crack the plastic brackets when you tighten up those PITA bolts. Once those are secured the headlight unit can be aimed with the long adjustment screw sticking out the back of the headlamp housing.

Beaner - I know you know I've been there! Do I need to drive down there?