Use the tip of a spudger or a clean fingernail to flip up the hinged locking flap on the trackpad cable ZIF connector.

Secure the cable by flipping the locking flap down.

If your trackpad cable comes with adhesive, remove the plastic liner and press the cable into place on the trackpad.

If the cable doesn't have adhesive, use a strip of double-sided tape to secure it to the trackpad.