I use so many different bags in the mountains for everything from day hikes to various size backpacking bags to backcountry skiing bags, that it’s not possible to have my FA kit in the same location from bag to bag. Some of the SG bags have a zippered pouch near the top of the bag that I like as a FA kit location, but for day bags, the FA kit ends up in the bottom of the bag. Sometimes, I put it in the lid.
With that in mind, I put a small piece of velcro on all of my bags with a small FAK symbol so the location is easily identifiable. On my hunting and backpacking (SG) frames, I carry the TQ on the hip belt next to my hip pouch for immediate access. I couldn’t make that practically work for my ski bags (where it would be more imperative to have a TQ immediately available) as it just too easy for them to get ripped off in a fall, so it just goes in the FAK.
That all took me quite a bit of experimenting to arrive at. I’ve yet to have a backcountry emergency that required anything more than gauze and bandaids, but I’ve had multiple acquaintances and partners be involved in some fairly horrific accidents, mostly backcountry skiing, where there were serious injuries and fatalities where TQs, pressure bandages and even chest seals were deployed.