most OBD 2 ports a located below the glovebox or under the steering column, sometimes they have a cover over them that you just pop off. if you still cant find it just take the car to your local...
For the 2002-2005 Sonata, the entire front piece consisting of the middle vents down to the the ash tray/coin draw including the radio has to be pulled straight out ...not down or up. It takes abit...