First and foremost, your new snake should never be anywhere near your other snakes until it is out of quarantine. Otherwise you risk transmitting mites and a whole slew of nasty diseases from your new critter to your established collection.
http://ball-pythons.net/forums/showt...antine-process
Next there is a long thread on how to set up a tank for a ball python:
http://ball-pythons.net/forums/showt...-With-Pictures!
Finally, both of those hides are inappropriate - they are way too big and the openings are too big to make your snake feel secure. Your ball python needs a hide with a tiny opening barely big enough to squeeze into, and the hide itself should be just barely big enough to hold your snake.
In the wild ball pythons spend much of their time underground in termite mounds. Wide, open spaces stress them out to the point they stop eating.