Later installation of storage tray

I ordered my EQE without the storage tray under the center console, because ordering along would have meant that I would have had to choose a package that cost more than 14,000 €, which I did not want. However, since the storage tray is very practical, I ordered it as an accessory and now questions about the installation. Certainly none of you know exactly with such a detail, but nevertheless the following questions (see also pictures): 1.) The storage tray has at the head side (i.e. in driving direction) 2 As I can’t imagine that for configurations without a storage tray the constructions under the carpet cover are made differently, I think that even with my car under the teppisch there are somewhere the openings for the folding, so that I only have to cut the teppisch. Question: can this be, or do you think that the substructure could look different with me, so without the folding openings? When I feel the carpet I can each 2.) The same applies to the underside (see picture), because there is a protruding nose and 2 screw extinguishers in it. During the visit to the factory last week in Bremen, i.e. before the pick-up of the car, I could only look briefly into the interiors of EQE and EQS which passed by me on the prefabricated conveyor belt, but unfortunately in terms of fixing the storage tray could not detect anything. to remove the pin and simply screw the shell down and forward, but that should only be the last option. Does any of you have more information about this? Thank you. Herbert