would they be accessed from inside the boot,or parcel shelf area somewhere?
To take mine out I had to remove the fibre parcel shelf to get to the screws.
To get the fibre shelf out I had to remove the trim either side of the rear window.
To remove the trim I had to remove the fixed parts of the seat backs.
To get the seat backs out I had to pull out the seat base..................
Not impressed.
First time, yes the whole rear of the car has to come out, seat base, side bolsters, c pillar trims, head rest sockets, and all the trim and clips holding the leading edge of the parcel shelf, seat belt clips and bolt, then remove parcel shelf without dragging the rear blind (if fitted) studs across the speakers, if the parcel shelf itself is not glued in by windscreen sealant, just to get to the 6 or seven nuts(or are they screws) that hold the Bose shelf in place.
Second time you do it, remove head rest clips etc and just rip the bastard thing out (if no blind fitted)

Not impressed either.
And that's without relocating the Bose amp(not too bad) and extending the speaker wires.
But it does free up a suprising amount if boot space.
