I'm trying to re-instate the phone cabling in my house after refurbishment. Master socket is fine but one extension is not working. I spilt the cable when renewing the skirting and now have two loose ends. The one coming from the main socket has an orange, white, green and black cable and the extension socket end has 8 coloured wires, orange, green, green/white, orange/white, brown/white, brown, blue and blue/white. I've got a screw type junction box with 6 entry points either side. How do I connect this?