NASA Explains Why the Hole is at the Pole

When trying to show how the hottest area of Enceladus could end up at what is normally the coldest area of the planet, the pole, NASA explains that the least dense portions of a spinning body will eventually line up with the axis of rotation. NASA uses the example of how a spinning bowling ball (if not counterbalanced) will eventually shift until its least dense portion, its holes, line up with the axis of rotation. In the same way, it necessarily follows that a planet's polar openings will line up with the axis of rotation.

There has been much speculation among hollow earth enthusiasts as to the location of the polar openings. I feel its safe to assume, per this example and others, that the openings are located at precisely the northern and southern geographic poles.