And by the way,
Hides should be "low ceiling" types...snakes (& especially BPs) prefer "back pressure"- feeling snug so predators can't sneak up on them. Nothing wrong with using modified boxes & toss when they get dirty, until or even instead of plastic+ ones. Whatever keeps our snakes comfy, eh?
Those appear to be bigger ventilation holes than most use, so if (-?) you have trouble keeping the humidity up, you can always tape over some. (on the outside only, please- no tape ever inside a snake's home, trust me, lol)