Gluing the tab sounds tricky
super glue and epoxy glue may not be anywhere near strong enough. Super glue may be a better bet if the surface is rough.
Some sort of styrene glue like plastic model glue may be the best bet. But frankly, given the large area being used as support and the tiny area of the breakage, it's likely somewhat doomed to fail again no matter what :/
If you do manage to get it glued on, and the connector reattached. I would figure out a way to immobilise the cable really well so that it can;t be moved up or down ever again.