Replacing Rear Window Defogger Switch

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I Am Trying to replace the Rear Window Defogger switch on my 1989 mazda 626 I removed the screws on the top of the instrument panel and cannot find anymore screws to remove I even pulled out one of the air conditioner vents to see if there was one in there holding it in place but nothing I found 2 screws near the stearing column and also removed them seems like it is still held in place on the sides by something but cannot find can someone help