Hi, I have just removed my daughters ceiling (main) bedroom light as I am trying to fit a newly purchased one before it gets dark..and discovered three thick grey cables coming from the attic through the ceiling and into the old light connection...each one has 3 little wires sticking out, one Red, one Green and one Black. Which colour is which please? and which ones do I use as the new light fitting is very simple and only has three slots for wires and I obviously have 9 wires to deal with...hope this makes sense to someone..Please help ! Thank you.