I'm not so sure there's enough condensation build up inside termite mounds for a ball python to actually drink from. They have a pretty good ventilation system and usually maintain steady temps and humidity regardless of outside conditions..around 86 degrees and 90% humidity. I'm sure the soil is moist but I don't think it's dripping wet...
"The termites are able to regulate both temperature and humidity accurately inside the mound. They do this by opening and closing hundreds of openings in the elaborate above ground structures we normally see. These structures are in fact huge thermostats. It has been demonstrated that the workers are able to keep the temperature inside the fungus-growing nurseries constant to within half a degree. Humidity is kept constant by adding or removing moisture. In the Central Kalahari, termites are known to have shafts going hundreds of feet deep into the ground with workers going up and down to add moist soil to increase humidity."
http://my.gorongosa.net/staff/wurste...ltural_gr.html