IBM TransNote Hardware Maintenance Manual page 68

Note: The illustration shows the combo card. Connector
(A) is for the LAN feature and (B) is for the modem
feature. This slot also supports a Mini PCI modem
card or a Mini PCI network card. Step 7 depends
on the card type. Disconnect either (A), (B) or both.
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ThinkPad TransNote
Removing and replacing a FRU