Replace Rear Window Defogger Switch

I Have been trying to replace the defogger switch on my 1989 626 but for the life of me cant find what is holding the instrument panel cover ?I removed the 3 screws from the upper part of the cover and there were 2 down by the stearing column but I see no more and the sides of the cover are what seems to be holding . I even pulled one of the air ducts out too see if there was a hidden screw behind but nothing !!!!!! any help out there

I cannot say for sure, but most panels are held in with strong spring clips. They usually are around the perimeter and a "L" shaped pick comes in handy.