key card components

Hello!

I've trying to put the insides of my cracked key card for my Scenic II into a new card shell... Unfortunately when cutting the old card shell, I swiped through a rectangular shaped component... there are two of them, one in each of the top corners (opposite end to the battery) - - - the card still works though... does anyone know what these oblong shaped components in the corners do??? They seem to have lots of coiled wire inside!?!?!



Thanks,

John