Hello Devansh,

You need to apply the college for CMAT after the exams.

After getting shortlisted, the selection procedure will be conducted in three phases i.e. score of CMAT, group discussion and written ability test or personal interview. The qualifying Candidates will be notified their final selection either through mail or call letter, then the candidates may apply for the participating institutes by visiting their official website.

For further information you can refer to the link given below.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://bschool.careers360.com/articles/cmat-selection-procedure/amp&ved=2ahUKEwjPtNvB0dzmAhUnzjgGHce7CCoQFjAAegQIAxAF&usg=AOvVaw3Zp7UckmFs099L_Krtmfyq&ampcf=1

Good luck,

Hope it helps :)