Aiming headlights on a 1991 cavalier

hi everyone, just have a quick question- i have a '91 cav 3.1, and for the life of me i cant figure out how to properly aim the headlights. theres two bolts that look to be adjusters, but i cant get a pair of pliers or a socket on there to turn it. any much appreciated

You Need To Take A Good Look At Them Try To See What They Are. A FLASHLITE MITE HELP
Try Not To Use Pliers You Mite Strip The Screw
I Will Take A Look In My Book And Get Back To You If I Find Out What They Are

if i had to guess...on my 99 i had to use a socket that looked like a star, i don't know what it is called. But i have 2 of them per headlight. For horzontial and vertical...this might not be too help full. but i tried.