SOLTEK SL-61A User's Manual & Technical Reference page 13

Latch Latch
Side View of CPU Supporter Base
Step 5:
Flatten the two latches on the side of CPU. Insert the CPU
into the retention clip and notice that the heat sink is on the
right hand side of the board.
Lock the two latches to secure the CPU.
Step 6:
Insert the clip portion of the CPU supporter so that the heat
sink can sit on the top of the whole CPU supporter.
Top View of CPU Support Clip
Notice that the base and the clip of CPU Supporter may be
different from the figures shown here.
Hardware Installation 9