I hate to say it, but when out of curiosity I went to check behind my closet camera access panel last year, like Jeremy discovered there was no camera back; which is why when he asked I didn't chime right in. Hey, but at least I had a removeable panel! The unit must be either above or below the hole somewhere, but no easy repair or switch out regardless. Could it be his entire cedar closet back has to be unscrewed and removed?
Joel