I have worked in HR administering employer sponsored group benefits, including pension, 401k, 403b and 457k benefits for over 30 years, and I would not attempt a QDRO with anything short of an attorney.
Two things I am tired of typing: 1.) A wrongful termination does not mean that you were fired for something you didn't do; it means that you were fired for a reason prohibited by law. 2.) The above answer, whatever it is, assumes that no legally binding contract or CBA expressly says otherwise. If it does, the terms of the contract apply.