Unfortunately we still can't see your image. However is the scar perpendicular with the ventral scales? If so I have seen similar scars on my baby snakes. I have theorized that the scar is the reminant of where the snakes egg yolk was, in other words, the "snake belly button". As they shed successively they slowly lose the scar. It's interesting because I have seen it on more than just ball pythons, and even in live bearers. Not 100% positive about this, but I'm sure one the breeder guys could confirm or refute.