I have just removed a double wall socket as it was old and colour didn't match anything. only had a simple white socket to replace it with but had a problem. I have 3x cables coming in to the back box. no idea what they are all for.. anyway I can't fit all 3 feeds in to the new socket as the holes are too small. will pigtails connectors fit behind the faceplate ? or can I do something else to downsize each set of three wires?