With Audio Unit

Remove the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ).
Remove the bolts (A) and the screws (B), then remove the radio brackets (C) from both sides of the audio unit (D).

Fig 1: Identifying Radio Brackets, Audio Unit And Bolts And Screws
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the screws, then remove the center pocket (A).

Fig 2: Identifying Center Pocket And Screws
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the center pocket in the reverse order of removal.