MSI MICRO NLX BX4 User Manual page 19

C. OEM Celeron
processor Installation Procedures
Step 1: Insert the Retention Mechanism Attach Mount at the bottom
of the mainboard.
Step 2: Install the Retention Mechanism.
Look for the key on Slot 1, and match it with the Notch Key on the
Retention Mechanism for proper direction. Then, attach the Reten-
tion Mechanism to the Retention Mechanism Attach Mount. Use a
Screwdriver to secure the Retention Mechanism.
Notch
Key
Key
TM
Processor and Pentium II (S.E.C.C. 2)
Retention
Mechanism
SLOT1
Retention
Mechanism
Attach Mount
2-14