Is that a particularly early car? I'd heard that some cars actually had hole around there to make the ventilation system work but it was eliminated later due to potential for water leaks (and noise). Since you're in there I'd probably seal it up w/ fiberglass. What you see thru the hole is the back of your speaker.... Dave S --- In dmcnews@xxxxxxxxxxxxxxx, Mark Valuch <dmcvin6683@xxxx> wrote: > what is this hole for? > > Look in the photo album for the folder called "hole". > > Mark