Oracle Sun Server X4-4 Service Manual page 213

The DVD connector on the bottom of the back side of the board needs to be positioned under
the disk drive mounting cage.
11. Lift the spring-loaded metal hook and tilt the backplane board to its upright
position.
Set the board on its support flanges.
12.
To secure the board, release the metal hook.
13.
Replace the Disk Drive Backplane (FRU)
Servicing FRU Components 213