How Do I Take Off The Vents?

i am going to be putting the neon light that i have above my H.U. and imbedding it into the center-front vent....do those things just pop off? i tried to pop them off a few hours ago but it wouldn't come off....i wasn't sure if they were connected or not.

Here's a thread that should help you:

http://invision.aleromod.com/index.php?showtopic=21