Hi all - hoping someone can help. Incidentally, I'm not quite such a new member as I seem - thriftyoldbag lost her password and is thus thriftyoldbag1. This strap seems in perfect condition but I can't work out how to fasten it. In two sections, one with holes and a press stud, the other with a press stud and buckle prong. Sort of a handbag Rubic's cube. See picture attached - any and all info / advice appreciated! Thanks in advance...