What are the dark spots i can see through my albino snake?

I have a baby albino corn snake that I got about two weeks ago. I have tried feeding him twice with no luck. I have heard that this could possibly mean that he is constipated and was wondering if the dark spots i can see through his body are waste? The dark spots are visible through the underside of his body and haven't moved (so far that i can tell) since i bought him? Are these spots waste that hasn't moved through his body? Is he constipated or are these just some of the darker organs?