MSI CB54G2 User Manual page 6

Hardware Installation (2)
If you have a PCI adapter (MS-6834)
First, confirm that the system is turned off. Remove the computer's
case to locate the available PCI slot on the motherboard. Insert the
PCI adapter into the slot firmly; then, secure it with the bracket screw.
Replace the cover and connect the external antenna.
Installing PCI adapter
PCI slot
If you are not skilled at installing the PCI adapter, please ask the
vendor or an experienced technician for help.
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