transite south node on AC


Helle every1,

i was wondering wot is th emeaning of transite of south node on AC.
well in my hellish chart saturn in 12th squares MC and IC:andy:
transite jupiter squares moon sun mars in 3th natal.
most sites has filter from my country and not a way to find about transites would u plz tell me a good books about transites and 360 degrees. different site talk about diff meaningmany thanks for visiting my post.God Bless U all.