Honestly considering the size of the animal, the hide is TOO big, it should be snug fitting like a shell fits a turtle, same for the enclosure I would wait until the snake is at least 250 grams and a consistent feeder to move him in this type of enclosure.

This is what I would do https://ball-pythons.net/forums/show...-hatchling-101

Keep in mind that this is a very young animal and getting it back on track asap if not eating for you is something that needs to be done sooner than later.