Panasonic KX-TDE600 Installation Manual page 75

3.
Lift Expansion Shelf 1, attach it to the metal bracket on the Basic Shelf, and slide it backwards until it locks.
4.
Secure Expansion Shelf 1 to the metal bracket with 2 screws (B).
Screw (B)
3.2.6 Installation of 3- or 4-shelf System (Tower Type)
Metal Bracket
1
2
Installation Manual 75