I don't see black pastel, either. Just a very browned out jungle pastel. The train track markings do look a bit like het pied markers, but unless there was a pied somewhere in the known lineage I wouldn't attribute it to anything more than neat belly markings. However, if you had a pied or het pied female to pair him with at some point in the future after he's out of quarantine and completely healed, you could certainly try to prove him out as a het pied.