Orient the device so that it is facing top side up with the device open.

Lift up the lock tab that holds in the ribbon connecting the track pad to the computer using your finger nail or the plastic spudger.

Pull ribbon to disconnect the blue half but leave the ribbon connected to the device at the other end.

When placing the ribbon back in its location pull up on the lock tab, slide the blue end of the ribbon in, and push the lock tab down to secure the ribbon in place.