[j-nsp] Juniper Documentation Help

[Usman Tahir]

Hi, 

I was wondering if someone could help me out with the documentation of
Juniper, I come from Nortel Background and have to install M7's & M40e at
customer premise, configuration is not so much of an issue , I have
downloaded complete docs from juniper site , iam really struggling with time
constratints there there is no way I can go through the whole document in a
day , I was wondering if someone can point out a source which explains
systems basic ( I have read feature guide and systems basics ) specially how
slots are numbers how ports are reference etc ( just reference to right doc
would do ) 
Regards 
Usman