Not only in this place but at many places the financial institutions insure only the guarantors or the co-applicants instead of the actual borrower.
However since you have agreed for EMI repayment as a co-applicant there is no legal infirmity in the co-applicant alone being insured.
Whatever worth it may be, you may scrutinise all the loan papers through the copies you are i possession for the possibilities of you husband being insure, if you find any such relevant information about it, you secure it and apply for death claim or waiver of future EMI repayments.
Find out some clues with the help of a advocate by producing all the papers before him to get some benefits, if you are eligible.