Water bowl and heat question.

[Bogertophis]

Well no, I understand the purpose for using paper towels during the quarantine process. My question is––how much water should I add to the paper towel and where, so that I can maintain the proper humidity levels for her while she's on the paper towel as her substrate? And should it be added to the warm side or cool side of the tub?

I wouldn't add water to the paper towels at all- you don't want a snake laying on wet substrate. There's other ways to increase the humidity- you might try including a "humid hide" with a damp sponge- rather than using damp sphagnum moss (as we normally would) which would be terribly "helpful" to mites if there are any lurking.