got a question here ppl. i got a 79 with the kickpanels there. they look like they got ovals cut out for 6x9's already. but on the passenger side is this round hump lookin thing. i took it off and it has a vacuum diaphgm and a vent there. what is that vent there? and any way to move it to put a set of 6x9's up there? any input anyone? im 16, so take my lingo and what not for what it is... also say stuff in simple lingo.. thx.