Dell DL4300 Owner's Manual page 153

Steps
1. Align the notches on the backplane with the notches on the chassis.
2. Lift the release pin and slide the backplane toward the back of the chassis until firmly seated.
3. Release the release pin to lock the backplane to the chassis.
4. Reconnect all the cables to the backplane.
Figure 85. Installing the 2.5 inch (x2) hard drive backplane
1. SAS cable
3. hard drive connector (2)
5. backplane signal cable
Next steps
1. Install both the hard drives in their original location.
2. Follow the procedure listed in the After working inside your system section.
Related Links
Safety instructions
Before working inside your system
After working inside your system
2. release pin
4. power cable
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