The A/C duct has to be removed. Remove the center screw in the bottom of the filler panel below the steering column. Set your e-brake to get the pedal down out of the way. Being careful of sharp edges, grab and slide the duct to the right to disconnect it from the left A/C outlet. Carefully pull the duct downward past the e-brake release rod that passes through the dash, then slide the duct back toward the left to unhook it from the center distributor housing behind the ashtray. Installation is the reverse.