Thanks for the help so far. At the moment the room is to dark to see into so I can't give that information, will do so in the morning. The 'ground' is a green wire but also in the back of the mess is an older bare copper twisted wire. Twisted in the sense that there are two wires that are bare and have been twisted together with a yellow top so do not know if this is one of the bare wires you mentioned.
Will hook it up in the morning after getting last bit of feedback