Where to get power for electric antenna?

[toofastforyou]

I have a GM original '92 Buick Roadmaster cd player with equalizer radio in my GN (pictured below). I bought the adapter from GM including the round black signal adapter wire BUT I still don't know where to connect the power wire coming from the antenna so it will go up and down when the radio is turned on and off?…
Someone can help?

Claude.

 

[toofastforyou]

Ok found it…The problem was not in the connections at the back of the radio. I found that the wire coming from the antenna was not connected to the relay (above the glove box to the right)… …Everything's ok now.

Claude.