ummmm its at the back of the uv tube so unless you have a very flexible head its pretty easy to miss! but anyway, this wasnt intended as a thread so people could admonish me for being a bad snake owner, it was just meant to be humorous...
i went and had another look and the hole actually doesnt look big enuf for him to fit thru...yeah yeah i know, "pythons can fit thru seemly too small spaces"