I see where the object-shader and the light connect now; object-shader>shadergroup>lightlinker<lightgroup<lightobj ect. However, the default light is nowhere to be found. I geuss it's a build-in light that is not an editable light object.
As u can see in the attached image, the spotlight I created is easily found in the in-outs graph. But not the default light. :|

I can't figure out what's different in my scene that makes the objects black. Importing into a new scene works for now. Luckily only a few objects I had to rename and stuff. Just wish I could understand what Maya did. Or what I did to make Maya behave like this so I could fix it next time.