Most of these guys have a 24" high pressure hose that they tie a bolt snap to and clip it to their left hip D ring. If you use a longer HP hose like say 32" then if you attached a bolt snap you would usually hook it to your right chest D ring and disconnect it before you take off your BCD and just let it dangle or hook it to your left hip D ring and then move it again when you put your BCD back on to dive.
Another even easier way to attach a bolt snap to a HP hose is with Dive Rite's hose clip retainer. My wife and I use them, very easy to use, secure and easy to move around or take off if you want.
Regulator Accessories - Dive Gear Express
Another even easier way to attach a bolt snap to a HP hose is with Dive Rite's hose clip retainer. My wife and I use them, very easy to use, secure and easy to move around or take off if you want.
Regulator Accessories - Dive Gear Express