Congrats on scoring great marks.

You cannot directly apply for SLS NOIDA. You will have to wait till the cut off list and then on the basis of your SLAT score, you will be selected for PI-WAT (personal interview amd written ability test). 

A final list will be out afterwards on thi basis of you SLAT score (50%) and PI-WAT score (50%) following which you will have to report to the counselling venue and get your documents verified. Each campus releases their own merit list according to which you will get a campus.

You can go through the following link for detailed information:

https://www.google.com/amp/s/law.careers360.com/articles/slat-selection-procedure/amp

Hope this helped. Thank you.