Vendo, for one, placed the light ballast inside the cabinet door behind the liner on a few models so it could very well be hidden somewhere inside...
You will probably have to really trace wiring as best as you can until you locate wiring that disappears and cannot be accounted for terminating somewhere...
Thanks Jim. The wires go from the compressor compartment up through about a 1" square channel between the doors, up to the fluorescent tube location. I'm nearly certain the ballast and starter belong in the compressor compartment. It's the only thing that makes sense. I just can't find the screws to save my life.