On the back there is this retainer for the ribbon connection for the wireless charge coil, just the red rubber keeping it in place.

Second picture with the red circle was supposed to show the red rubber plug with some adhesive towards the screw underneath, but it escaped my tweezers at the speed of confusion and has taken refuge in the ether, no idea what use it had other than to look pretty, which is not very useful inside an opaque phone.

Third picture has all of the circles, all ph0, and all need to vacate the premises to continue. Orange is a tamper sticker screw, seems to be made of a proper tamper proof sticker material, it's only coming off in pieces.