Gateway 7400 System Manual page 49

7
Align the drive rails with the slots at the top and bottom of the drive bay.
8
Leaving the handle in the down position, push the drive all of the way
into the drive bay until the handle starts to close because of contact with
the front of the chassis.
9
Make sure the hooks on the bottom of the handle engage the edge of
the drive bay, then firmly close the handle.
10
Lock the drive carrier with the hex key.
41
Drives