HIKVISION DS-2CD3021G0-I Quick Start Manual page 23

Network Bullet Camera·Quick Start Guide
Screw
Hole
3. Take apart the junction box, and align the screw holes of the bullet
camera with those on the junction box's cover.
4. Fix the camera on the junction box's cover with three PM4 × 10
screws.
Figure 2-6 Fix the Camera on Junction Box's Cover
5. Secure the junction box's body with three supplied screws on the
wall.
Cable
Hole
Figure 2-5 The Drill Template
22
Junction Box
Cover