The capture isn't *that* good! That sort of result would be unexpected.
Heckmatyar would be in Osama's chain of couriers/messages, but it is a little doubtful that he'd know Bin Laden's current physical location.
Not out of the realm of possibilities, mind you, but a low percentage chance at best.
On the other hand, due to sheer geography, a capture of a courier in/near Heckmatyar could *easily* give up Osama's residence.