i think they were posted on this site not too long ago in the 3ds hacking and homebrew section or at least there was a link to them there, but i forgot which thread exactly ,but if you check through this section and go back a moth a few months and look for the 3ds roms dumped threads you will find them
but im not sure what you will be able to see, im not ure how clear they were, but i do remember it was a rather large looking apparatus
but as for seeing which pins are used im not sure if you would be able to see that