Use the tip of a spudger or your fingernail to flip up the retaining flap on the trackpad ribbon cable ZIF socket.

Be sure you are prying up on the hinged retaining flap, not the socket itself.

Pull the trackpad ribbon cable straight out of its socket toward the front edge of the Air.

During reassembly, ensure that this cable is inserted fully into the connector. If not, your keyboard, trackpad, or battery may not work as expected.