The battery grip is not integrated, the dented thing under the LCD is the attachment screw between body and gripI think is integrated
Well, no, it's not. But if you think it's integrated, what do you think that knurled thumbwheel on the grip with "lock" printed next to it will unlock if turned in the direction opposite the arrow?
Of course, the battery grip is integrated and not the battery itself. Therefore it has to be a "lock" there. Its not on the left but in the middle.
Here is on the left:
If not ... how do you explain that is no delimitation between the camera itself and the grip?
If this is o battery grip or WIFI or GPS, this was not the main point.
The main poit is that the 5D Mark-s have no (integrated) grip at all.