Panasonic WX-CC411 Operating Instructions Manual page 26

3. Make sure that the body is stuck completely through confirmation window [CHECK]
If you can visually stamp completely, it is properly installed.
Stamp is not visible, or if you are missing, it is not installed
correctly. If possible visibility, it is installed correctly.
4. Using the wall fixing clamp the supplied power cord and mounting (25 mm 4.1 mm ×) screws provided.
[Minimum pull-out strength 780 N {80 kgf}]
150 ㎜～200 ㎜