DFI 661FX-MLV User Manual page 23

3. The retention levers at this time remains unlocked as shown
in the illustration below.
Retention lever
4. Move the retention levers to their opposite directions then
push them down. This will secure the fan / heat sink and re-
tention mechanism assembly to the retention module base.
Note:
You will not be able to push the lever down if the direction
is incorrect.
5. Connect the CPU fan's cable connector to the CPU fan con-
nector on the system board.
Hardware Installation
Retention lever
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