OK, so Im taking my CD changer out (finally), and I get the whole damned bracket thing out, but there is a little plastic box underneath the bracket, with wires going into it. I have no idea what it is...

Now, I had DVD system in my car, from the guy who owned it before me... and I've taken most of it out, accept for the actual DVD unit, which is in the trunk. He has wires from the DVD unit running into this little black plastic box... and there are also factory wires running into it. Im clueless as to what this damned thing is... I want the DVD system out, but I'm afraid if I go yanking wires, I'm going to affect other components of the electrical system. if anybody can identify this little black plastic box, screwed under the CD changer bracket -- you'd be my hero!

My car is a 2000 non bose.