I tested the light to see if it still works. It does!! yeah who!!
This next picture isn't for the radio purist. I had to cut out a lot of the radio "insides" to make the AMP fit. I wanted to keep all the external knobs and buttons. So the cage in the middle had to stay. Some carving away from the center cage was needed. Then mounted the AMP to a piece of wood then wood to radio chassis.
I wired up the AMP's power to go thru the radio's on/off/volume button. Connected all the wires and tested it. It all turned on including the original light. Oh yeah!!
1968 Beetle, 1964 Panel, 1984 Vanagon Westy