Insert one arm of a pair of angled tweezers under the metal neck of the black antenna cable coaxial connector, located on the top left corner of the logic board.

Gently lift straight up to disconnect the cable.

To reconnect the cable, hold the connector in place over its socket and press down with the flat end of a spudger—the connector should snap into place. If you're having trouble, don't try to force the connector over the socket. Reposition it and try again.