I'm assuming these are Cuban. (All Cuban tubes are sealed. Not all cigar tubes are sealed.)

As long as the seal on the tube is good and the tube hasn't been opened, then just put them in the humidor. The seal (in Cubans) is usually waxed cardboard, so re-use/re-sealing may or may not work repeatedly.

Once inside the humidor, you can unscrew the lid slightly to allow air circulation (assuming you're going to smoke them within the next few years).

Tubed cigars were originally marketed to sportsmen, and meant to preserve a cigar outside a humidor. Tubos were also sold by railways (and then in airplanes), and even have a small sheet of cedar inside to help control humidity within the tube.