Gateway 7400 System Manual page 54

3
Install the drive into the carrier using the four screws you removed in
Step 2.
4
Align the drive rails with the slots at the top and bottom of the drive bay.
5
Leaving the handle down, push the drive all of the way into the drive
bay until the handle begins to close because of contact with the front
edge of the chassis.
46
Replacing and Adding System Components