It doesn't matter, they are not our lands to begin with.
There should be a series of plebiscites, first with one question. "Do you want Independence? or Join Pakistan / India?"
If Independence fails then we vote between Pakistan and India, if Independence wins we don't need to do the second plebiscite.
Upon any resolution we'll make it mandatory on the Kashmiris to allow another plebiscite to for regional votes.
In case Jammu, Leh and and GB don't agree with the new federation and want to be with Pakistan/India.
This ensures democracy wins. The people get to choose.
PS Northern Areas is known as GB now. So you cant count that separately.