Dell XPS 15 (L521X, Mid 2012) - Manual (Page 32)

7 Remove the screws that secure the interposer to the optical-drive assembly.
8 Disconnect the interposer from the optical-drive assembly.
2
1
3
1 optical-drive assembly 2 screws (2)
3 interposer
9 Remove the screw that secures the optical-drive bracket to the optical drive.
10 Remove the optical-drive bracket from the optical drive.
2
1
3
1 optical drive 2 optical-drive bracket
3 screw
32 | Removing the Optical Drive