Panasonic KX-T336 System Reference Manual page 53

<Expansion Shelf>
Front Panel
1. Rotate the key on the front panel
counterclockwise to unlock.
2. Open the front panel toward you at right
angles to the expansion shelf.
3. Remove the front panel by lifting it straight up.
Side Panel
,
/
Screws
d
Q
Guides
v
1. Remove the right side panel by loosening the four screws.
2. Remove the left side panel by loosening the four screws.
2-B-9