Panasonic KX-UT113 Operating Instructions Manual page 67

Installation and Setup
For KX-UT113/KX-UT123:
2.
Fasten the wall mounting adaptor to the base with 1 screw. (Recommended torque: 0.4 N·m [4.08 kgf·cm]
to 0.6 N·m [6.12 kgf·cm])
For KX-UT133/KX-UT136:
Document Version 2011-09 Operating Instructions 67