One of them was caught in UP, the other in Delhi, the others are supposed to be in Haryana and Himachal. They wouldn't have stuck around in same state from where they escaped.The more safe and reliable way of escaping to Pakistan is crossing it through international border of Punjab, To escape through Dubai you need passport etc which is not possible for this guy right now.
Abdul Basit wouldn't have link him to anyone. That is not possible. And as I said we have been meeting Huriyat guys long before Abdul Basit was our ambassador in India.
The way I see it, he would have tried to get in touch with the pakistani embassy to help him escape so that he can join up with the rest of the khalistanis who are in pakistan, the embassy would have given him new identity papers / passport that would have helped him escape. Or, helped him smuggle out through the militant route.