Hey there! As JoSAA treats the Defense Services ( DS) quota as a supernumerary category (extra seats) in IITs only, hence, NITs including NIT Bhopal don't have separate defense quota seats. They only follow standard reservation like OC, GEN, OBC, SC. The DS quota matters only if you also apply to IITs and that's automatically checked if you submit the DS certificate. There's no seperate defense quota button in JoSAA you just select your main category and upload proofs, including the DS form.

If you any further queries feel free to ask!