HiCustomer Thank you for asking your question on Just Answer.
According to the diagram I have (below), it appears that the aiming screw is at the top of the headlight assembly. So to make the headlights go down, you would turn the screw clockwise. This would extend the end of the screw and cause the lights to go down. Counter-clockwise should make them rise.
It should become apparent which way they move after a couple of turns of the screw.
I hope this helps.
Take Care, Greg A.