Having all Shimano stuff*, I use
these instructions.
They are installations papers and have great drawings and accurate adjustment procedures.
Those, combined with a search on the Bicycle Mechanics forum have got me out of most every jam that I've gotten myself into.
A lot of times it helps to search the mechanic forum to get several methods and tips just to do a routine something easier or quicker.
This thread is forever long but has a lot of good stuff if you haven't seen it yet.
*It's not that I am a Shimano freak-nutcase, it's just what happens to be on my bikes.