I wonder why you can't just like the good stuff, burrows, holes, temps choices, etc etc. and not worry about the other.
You do know that bonding is a product of time and experience. If you set young snakes up in a way, they can be snakes, like the cages you just saw, you "may" observe, if your lucky, some individuals showing a perference for other individuals. Even to a point that when one is removed from the cage, the other goes nuts and crawls and crawls until you put its cagemate back. You see sir, its about creating a situation where it can occur, then observing it, as it builds.
ITs also REQUIRED that you have some experience with BEHAVIOR, as then you would understand you cannot take an individual snake thats been all its life in solitary confinement and put it with another and SEE BONDING. WHat you will see is cannibilism.
AGain behavior is about EXPERIENCE and genetics and time. Bonding is something BUILT. its that way with people too. Cheers