If you are installing an optical drive in any of these systems:
Power Macintosh G4 QuickSilver
Power Macintosh G4 QuickSilver 2002
• Power Macintosh G4 "Mirrored Drive Door"
• Power Macintosh G4 "FireWire 800"
• Power Macintosh G5 (all models)
• Mac Pro (all models)
You will need to remove the front door to allow the tray to exit the computer properly. This is identical to the existing drive mechanisms installed in those systems. To do so, simply use a paperclip to manually eject the drive tray using the emergency eject hole on the front of the drive bezel, gently pull the drive tray open and turn it upside down.