Well as long as you know the temps are ok, don't worry about where he likes to hang out (literally, lol...). Snakes like to grab onto things to feel secure*, & some
like to climb more than others. (*actually, they can hardly move if you put them on a smooth glass table; they use their muscles & their scutes to grip & push against
even the slightest surface texture, & they prefer knarled branches way over smooth dowels.) As BPs grow larger & heavier their climbing won't likely continue anyway.