Hi there,
With 40,000 rank in SRMJEE, there are still many options available to you.
The branches that you have a chance at with their respective campuses are:-
1) SRM Chennai:- All branches except CSE, IT, ECE, Mechanical
2) SRM Ramapuram:- All branches are available to you
3) SRM Vadapalani:- All branches are available to you
4) SRM Ghaziabad:- All branches are available to you
5) SRM Sonipat:- All branches are available to you.

If you are interested, I would suggest you to go with CSE or IT at Ramapuram campus
Hope it would help,
Thank you