The same thing happened to me, one popped out nicely which considering that I had no idea how they were held in there seemed lucky and the second one broke both tabs. I used gorilla glue on the broken tabs and let them sit overnight before snapping it back in and it seems to be holding well. I thought that if that didn't work I would use 3M two sided tape but the problem with that is that if I would ever want/need to take them out again it would be very difficult to get them off.
VietNam vet, Pontiac lover
1969 Firebird 350, Carousel red t-5
2009 G8, Switchblade Silver V6
2008 Solstice GXP, Sly manual
2008 Grand Prix, Ink Slate