OPENREACH NTE5c MK2 BT Telephone Socket No special tools required to make connections Fits over an existing rear box using original screws. Easily replace old NTE5a sockets in minutes. REMOVABLE SCREW WITHOUT FRONT BOTTOM COVER Press the clips on both sides to remove the front bottom cover. Lift the clear Cam Lock connector from the bottom Thread the colored leads into numbered holes. Push Down Cam Lock automatically makes the connection