Hello aspirant,

Your question "seperate registeration required for Paper 2, JEE Main in Career 360?.... Kindly confirm" is not really clear. It doesn't mention registration to which services offered by Careers360 you are talking about. If you are referring to JEE Mains paper 2 college predictor, then yes, you need to register and pay to avail the facilities.

Here's the link:
https://engineering.careers360.com/jee-main-architecture-college-predictor?icn=QnA&ici=qna_answer

Hope this helps you.