What is that in just above of dvd writter in dell vastro 3300?

its like a plate made of of plastic having two pores when we push the plate then it comes out from the laptop and then i don"t know what is that or:it

its like a plate made of of plastic having two pores when we push the plate then it comes out from the laptop and then i don"t know what is that

or:its like a plate made of of plastic having two pores when we push the plate then it comes out from the laptop and then i don\"t know what is that

Tags:plate,