Supermicro SuperServer SYS-741P-TR User Manual page 45

2. First, turn over the CPU carrier and locate Pin 1 on the CPU and Pin 1 on the carrier.
Then, turn the processor over with component side (including the gold contacts) facing
up and locate CPU keys on the processor. Finally, locate the CPU keys and four latches
on the carrier as shown below.
CPU Key
CPU Key
Chapter 3: Maintenance and Component Installation
CPU Key
SP XCC
CPU Key
SP MCC
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Latch
Latch
Latch
Latch
Latch
Latch
Latch
Latch