You REALLY need to know this;
Just make your own if you can't find the manual. Just create a numbered list and listen to each note and write down a description. Chances are your prose won't be any worse than the stuff that's written in the manual. Both my Kawai and Roland came with detailed maps of what note was supposed to be what sound, but when it comes right down to it you really have to <listen> to each sample and get to know it before you can use it to its full potential in your music.
So the exercise isn't a waste at all.