Lorex SG21CD7484UQ–A80 Instruction Manual page 28

Connect the HDD into the Cartridge Casing
3.
Take the Hard Disk Drive and Connect the two cables from the back of the Cartridge Casing to the HDD.
The cables should be pushed in firmly, but not forcibly.
The 4 Pin connection is the DC Power cable, and the wider cable is the standard Hard
Drive IDE type connection.
Secure the HDD in the Casing (optional)
4.
Use screws and tighten them, positioning the HDD into place. This step is optional, but it is recommended.
Slide the top Cover over the Cartridge Casing
5.
Slide the Cover forward over the Cartridge Case. Ensure it is secured in place over the release latch.
Reinsert the Cartridge Casing into the DVR
6.
Fully insert the Cartridge Case into the DVR.
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