Ask Logitech K260 how to disassemble the keyboard and remove all the screws. It is said that there are bayonets, but I don't know what happened. Please answer, it is better to have!
Make sure that all screws have been removed (including those behind the white round label with the "OK" sign on the back of the keyboard) and that they can be easily removed when the gap is closed by hand or screwdriver.
Logitech K260 keyboard disassembly drawing