IBM PS/2 90 XP 486 Hardware Maintenance Reference page 9

2.1.1 Cover Lock
Model 90: the cover lock is in the middle of the rear panel of the system
unit. The cover cannot be removed without the cover-lock key.
Model 95: the cover lock is on the front panel of the system unit.
front bezel and side cover cannot be removed without the user's key.
If the keys for the cover lock are lost, order a new cover-lock assembly
(see "Parts" in the Hardware Maintenance Service pamphlet).
IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR
Cover Lock
¦ Copyright IBM Corp. 1990, 1992
2.1.1 - 1
The