The tubes are held in place by an adhesive but in the one mod sent to me they were pulled out fairly easily. Without these tubes in place any tear in the wrap of your batteries could cause one of the batteries to be short circuited. This can cause it to overheat, vent, or even explode.
Always make sure both plastic battery tubes are in place before inserting batteries into your H-PRIV2!
Since I had the unit I decided I might as well do a tear down. They did not make it easy! The screws were hidden under very well stuck on side panels.
Tear down photos: https://imgur.com/a/QkoibiX
My sincere thanks to All Day Vapes for bringing this to my attention and sending me a unit to inspect!