It doesn't look melted to me, it just looks like the contacts have been folded back with the white plastic backing (but still needs replacement)... Take care when connecting these multiple times, they are fairly delicate. Make sure when fitting, it's perfectly straight/flat, if anything try to slightly angle the metal contact side down when fitting (not by much, 5-10 degrees or so) when inserting (imagine the metal touching the contacts inside the connector first). That way less chance of peeling back. Hope that makes sense!