Dell PowerEdge VRTX Owner's Manual page 120

13. Pull the backplane release pins in the direction of the system board and lift the backplane from the chassis.
Figure 78. Removing and Installing the 2.5 inch (x25) Hard-drive Backplane
1. hard-drive connectors (25)
3. SAS cables on backplane expander board (2)
5. backplane expander board
Figure 79. Back View of the 2.5 inch (x25) Hard-drive Backplane
1. release pins (2)
3. backplane expander board connectors (6)
5. backplane expander board brackets (2)
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2. release pins (2)
4. power cables (2)
6. hard-drive backplane
2. slots for chassis hooks (10)
4. guide pins for the backplane expander boards
(4)
6. power cable connectors (2)