SOYO SY-6IBM User Manual page 13

Hardware Setup
3. Insert the CPU into the retention module. The CPU fits in the
CPU slot in only ONE way, do not try to force it in.
4. After completely inserting the CPU, push the two locks on top
of the CPU outward. Now your CPU is ready for use.
To remove the CPU, press the two notches on top of the CPU
inward. Now press the two slides on the retention module down
and remove the CPU.
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SY-6IBM