LOL i dont think you would ever be able to work out what to do in one of them. have you ever seen inside one? Its a jungle
Me and some mates tried to find someones house once but there are roo many wires lol
I wouldn't advise anyone to go messing around in these cabinets. To save a tenner a month its simply not worth the potential risks involved !
I managed to look inside one of them when I called an engineer round to fix a problem with my broadband connection. Each wire has tags on them displaying the door number. So I'd imagine you'd have to find the feed with your door number on and just screw it on but its not advised. Just take out a sub of some sort.