If you look at those pictures, you'll notice that it ataches directly to the "foil-plug" of an A1200/600-KBD, so no luck for A1000/2000/3000-KBDs that use a regular PCB (and have the KBD-CPU on it).
At least some A500/A2000 keyboards have the same ribbon connector but only maybe 1cm length, so connecting could be possible but not in very meaningful way. Even if it was possible to connect it physically, it would be impossible to fit the board inside the keyboard. So this won't work...