I wouldn't think the section level Bowman would fit in a utility pouch. With the battery on its a bit of a brick. The PLCE pouch is a beast too and I wouldn't put it on my webbing. Daysack all the way.
Most blokes used to stick it in their utilty pouches, G10 or off the shelf I don't know. Mainly because it was a pain in the sphincter chopping and changing belt kit. But you're probably right, daysacks were the logical option, especially when it came to re-filling them or doing battery changes.