to be honest, i am not indian so i do not know the specifics of how indian universities handle this. but if you register your degrees in your WES profile, it will generate placeholders for your degrees and then you can check the instructions. they have specific instructions for every country. they accepted sealed envelopes for some countries but not all. they also provide a request form that you can fill and take to your university to have it mailed over to WES.
all the best.