Radio 1973 Dart

What holds the radio in the dash? I know there are 2 nuts behind the radio buttons that holds it to the center console, but is there a bracket inside the dash that supports it? The reason I ask, is the previous owner cut a hole in the center console and put in a crappy stereo that fell back into the dash. I have the center console piece and the correct radio, just not sure what to expect when I get inside since his radio fell into the hole.