Tbh all you’d really need to do is make the heel’s stick a lug and the shoe’s heel a spot to catch it. Line the lugs up with the hole and twist it to lock it in, twist again to unlock it and pull it out. Or could just use screws, maybe a long one through the bottom (and inset a little to avoid clicky clacky screws) that doesn’t fit all the way to the human heel but catches the shoe.