HIKVISION DS-KD8003-IME1 Quick Start Manual page 59

Video Intercom Module Door Station·Quick Start Guide
Figure 3-56 Insert the Modules
13. Pull the grounding line out and fixed its two end to the screw on the cover.
Figure 3-57 Connect the Grounding Line to the Cover
14. Use the hexagon wrench in the package fix the cover onto the frame.
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