@polymathematic take a look on here https://www.youtube.com/watch?v=fBjnFsaBzzU and see if it works for yours. If not post some pictures of what your set looks like with the Ear cushion off.
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=== Update (05/12/2018) ===
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there should be no reason to disassemble the opposite side. It appears that the part marked by the blue arrows is part of the cushion assembly. Right below that must be the driver (speaker) See if you can remove that part....[image|1454128]
@polymathematic take a look on here https://www.youtube.com/watch?v=fBjnFsaBzzU and see if it works for yours. If not post some pictures of what your set looks like with the Ear cushion off.