Could you link to that study? Because all the video showing the locals hunting ball pythons, all but one was taken directly from termite mounds.
If a study was done that the people did not break open termite mounds at all, then no, they wouldn't find any in termite mounds. The pythons don't put out tiny signs declaring they live there.
I don't see any reason for local hunters to go right for termite mounds, find multiple snakes in the mounds, if they aren't naturally found there often. It'd be like hunters searching treetops for feral pigs.