No, if you take admission in Manipal college then JEE Main marks doesn't matter. 

In order to take admission in NITs/IIITs and GFTIs JEE Main marks matters.

To take admission in IITs you have to qualify JEE Main exam first.

Some good private colleges also consider JEE Main marks to provide admission.

State level government colleges and private colleges like BITSAT, VITEEE, SRM and in Amrita JEE Main has no role.

Good Luck!!

Hi Shubham

If you get admission in Manipal Univeristy on the basis of MU OET scores, just focus on your course while studying, because your JEE Main marks will not be considered anywhere in future.

The university offers good placement. The companies may consider your class X or XII or your four years graduation scores during placement but at the latter stage, that too will not be considered.

Relax and all the best!