hello aspirant,
I am here for helping you as per your doubt I am providing you in link below where you can see all about CSAB registration for engineering you will see some important dates related to it...
Link is given below:
https://engineering.careers360.com/articles/csab/amp#referrer=https://www.google.com
I hope it will be beneficial for you....
For more queries you can upvote my answer and can ask in the comment section below...
Best of luck...