Hello aspirant!!

To get CSE in main branch you should get below 5k in KLUEEE based on previous years cutoff trends. As your rank us 12200 you may get seat in other campuses of KL University and may get CSE there. 

Go through the below link to know in which KLU you can get CSE seat. 

https://engineering.careers360.com/tags/cutoff-of-klueee

Hope this was helpful :)

Good Luck!!

Thank you.