IBM BladeCenter QS20 Problem Determination And Service Manual page 68

Figure 11. InfiniBand card connected to PCI Express adapter card
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BladeCenter QS20 Type 0200: Problem Determination and Service Guide
8. Mount this assembly into the BladeCenter QS20 so that the InfiniBand ports of
the InfiniBand card point to the front bezel and match the respective ports of
the front bezel.
9. Secure the assembly with the four screws that were delivered with your
InfiniBand card, see Figure 12 on page 51.