I have the (What I presume to be) the BT cable coming into the master socket as BLUE to Terminal B and WHITE to terminal A, there are also the following wires connected,I presume theses wires are to a second phone socket....Orange/White 3, Blue/White 2 and White/Blue 5. If a replacement master socket just has pins 1 - 6 would I connected the second phone socket as it is now above?where would the wires connected to A and B go ?