One thing I've tried and seems to work quite well (on another application) is UV curable plastic. The last thing I fixed was when the post holding one side of the exit paper tray broke off, and I used the UV curable plastic to fix it (still working just fine.) The trade name is Bondic, and I ran across it on a YouTube ad (first time EVER I bought something from an unknown YouTube ad!) This apparently is the same type of UV curable "glue" used by Dentists. It cures in about 4 seconds!
My guess is that the formed over part has broken off (you might find some little white disks of plastic, about 1/8" diameter, rattling about inside the case). Alas I have never found a way to re-fix them. There's not enough plastic in the housing to drill it out and fit screws/nuts. There is no way of gluing something to the ends of the posts that would be strong enough, -tony
