WARNING: This page is about a different car, the 2007 Kia Optima, 2007 Kia Magentis, 2006 Kia Optima, and 2006 Kia Magentis. However, it is still accessible from the selected car via links, so may be relevant.
Remove the armrest mounting cover (A).
Fig 1: Identifying Armrest Mounting Cover
Courtesy of KIA MOTORS AMERICA, INC.
After loosening the armrest mounting screws, remove the armrest (B).