[Booty]

First thing is to check that your stereo has an electric aerial facilty. If it does then the 'live' will come from the back of the stereo and when you switch the unit on the aerial will operate. There should also be an earth which you could put straight to the earthing point on near to the rear lights. The only other wire needed in my opinion would be the thick black aerial one. I had an electric aerial on my Cq many moons ago and it had two wires, Red ( switchable live from stero) black ( thin earth wire ) and of course the thick black aerial one.
By the way if you do not have an electric aerial facility you will have to run a switchable live to a switch ( that you will have to position yourself ) to enable the aerial to be extended. Hope I haven't confused you too much!!