Dell Alienware M17x R4 (Early 2012) - Manual (Page 74)

74 | Removing the Optical Drive
4 Remove the screws that secure the optical-drive bracket to the optical drive.
1 optical-drive cable 2 screws (2)
3 optical drive
1 optical drive 2 optical-drive bracket
3 screws (5)
1
3
2
1
2
3