In the top you see the back of the hotshoe. Thanks to crazy Sony engineers it is screwed from inner side - in old versions it was from outside, the repair would take 5 min. But o.k. this is premium, so I tried to fix it from here.

The angle for the screwdriver is bad, it was possible to unscrew the hotshoe and also the cable was disconnected.

The connector is somewhere in front of the top of the camera, no real change to get it reconnected!