What did they live in originally?
I am lucky enough to have an LK70 Swedish Army Bergen and there are three exterior pockets, the one on the front of the bergen is tailor made to fit the SAT, which came first? the SAT or the LK70? well I couldn't say off the top of my head but it's such a neat fit it's obvious that the pouch and the SAT are a matched pair. Oddly enough I also have the LK30 which hasn't got anywhere to store the SAT other than inside the main pack (there are no exterior pouches on that one at all)
HTH
Sean