Eject your ExpressCard or ExpressCard dust shield if you want to transfer it to the new ExpressCard cage. Eject the card by pressing it in until it clicks, releasing it, then sliding it out.
Remove the 3.80 mm Phillips #1 screw securing the ExpressCard cage.
Remove the two 3.70 mm Phillips #1 screws securing the ExpressCard cage.
Lift the ExpressCard cage out of its connector.