just tried taking mine off... sapped the prong things like u said above! haha!
they werent metal tho... they were plastic, and it looks as tho it was part or the grill?!?! the holes in the honey combe grill where the prongs went into are blanked off (no hole all the way through like the others), and it looks as though the prongs were attatched to there?!?
saying that it was quite dark!
il have a proper look tomo
ive painted mine and im gonna double sided tape it back on tomo