If a tool for removing connectors is included in the package with the new card, use it to disconnect the cables from the card (3). If no such tool is included, disconnect the cables from the card (3) by picking up the connectors with your fingers and gently unplugging them. Then remove the card (4).
Align the contact edge of the new Mini PCI Express Card with the corresponding socket contact of the system (1). Connect the cables to the new card (2).
Pivot the card down (3), and secure it with the two screws (4).