AT&T TL760 - Manual (Page 7)

6
Getting started
Headset base installation
Before installing the headset base:
Remove the rear bottom piece of the headset base by pushing it
away from the base (as shown in Figure ).
Install the headset base as shown on the following pages.
After completing installation option  or 2:
Slide the rear bottom piece towards the base until it clicks into
place (as shown in Figure 2).
Figure 
Figure 2