Compaq AlphaServer ES45 1B Owner's Manual page 41

Both the tower and pedestal systems have a small front door through which
the control panel and removable media devices are accessible. At the time of
delivery, the system keys are taped inside this door.
The tower front door has a lock that lets you secure access to the disk drives
and to the rest of the system.
The pedestal has two front doors, both of which can be locked. The upper door
secures the disk drives and access to the rest of the system, and the lower door
secures the expanded storage.
NOTE: See Chapter 4 for warnings and procedures for accessing internal parts
of the system.
System Overview 1-25