Everything thing about that enclosure is wrong but it can be made to work.
Needs hides, a hot and cool side would be good (move the heat lap to one side), cover most of that screen top with foil to hold in humidity, the gauge it came with sucks (go to walmart and get a digital), and get a couple bricks from Lowes or Home Depot to put on that lid.
That looks to be a 10 gallon aquarium, your snake will outgrow that one in a couple months.