Rotate the headlight assembly to 90 deg from closed. You can do it electrically by opening the lights and turning the switch immediately towards the closed. Alternatively, turn the motor manually with the knob on top of the headlight motor. ( you can watch it turn when the lights open). Then you can get at the side screws that hold the bubble cover over the assembly, and the two screws above the front of the headlight. Once you remove that cover, you can get at the hidden  screws for the flat cover. Between them and the two exposed above the headlight, you should be able to get the height you want.