Cisco NCS 2006 Hardware Installation Manual page 288

Installing the Cisco NCS 2006 Door and Other Modules
NTP-L39 Install the Deep-Front Panel of the NCS 2006
Step 2 Loosen the deep-front panel screws and slide them outwards using the plastic tabs (see the figure below).
Figure 152: Loosening the deep-front panel screws
Cisco NCS 2000 Series Hardware Installation Guide
260