There are very good guides available; you just need to look for them. However, you shouldn't expect to find an instruction manual here that explains how to install competing products (since Rainer does that too). I won't give you what you want or what I want.
However, I am sure that you will find something if you search intensively
Here's the translation:
There's a guide available as a PDF, but it's in English. Now, let's think about how it might be called in English to install the nozzles! (but this was already a lot of help)
EDIT: I just searched for it, and found it after 10 seconds
