Primary use a Goodman handle with a SS snap bolt attached. Park either by hanging cord over neck (momentary) or hooking on R chest "D" ring and tucking cord under waist strap next to the cannister.
Backups use SS snap bolts attached with "cave" line (#24 braided nylon) and hooking on chest "D" rings, and secure under bands threaded on shoulder straps made from 2" bicycle inner tubes. Very streamlined and not prone to entanglement, yet very fast to deploy (pull from rubber band, turn on light, then unsnap), as they ride tucked in on my sides. Pic on my photos, notice second band (in case or band breakage).
No extra money for fancy toys, just simple hardware commonly available.