I got a Tech21 MagSafe case for my just arrived today pro max. It has me wondering how it all works. Is there a magnet in a MagSafe case that connects with the magnet in the phone or does the magnet only face outward to hold accessories and chargers. I have seen pictures of phones with rings between the back glass and the magnet in the phone and I was wondering if MagSafe cases protect from that happening.