Headlight adjustment in Lesabre 2005

Compared my 2005 lesabre to 2004 lesabre and noticed that headlight adjustment mechanism is missing. Dealer's service people searched their computer and found out that after 09 2004 lesabres do not have it; they showed to me another lesabre also without adj mechanism, so it looks like it is not missing, just another modification. But how to adjust headlights, if needed, nobody knows. If someone knows, please, let me know. Thanks.