if you open your hood and look at the back of the headlight, you'll see a while thing sticking out. it requires a star screw head (don't remember the name of it ).
yes i love to fill my posts with loads of technical terms as you can tell lol.
i was confused at first too but once you go take a look you'll see its the only thing that could be for adjusting.
2006 V6 Mustang
Ext. Vis: Mineral Grey w/ Yellow Stripes, Tinted windows, Shorty Antenna, Brake light chrome outline, Custom installed Fog Lights.
Int. Custom Vis: Yellow/Black Carbon fiber kit, 7 color LED ambient lights, Shaker 500 with PIE module connected to a Belkin Ipod Charger cradle.
Pref Mods: Bamachips 91 race+torque tune, C&L CAI, Custom dual exhaust w/ MAC stainless steel mufflers, Front and rear GT sway bar, Shelby strut tower brace, GT take-off shocks and struts.