It appears from the lower photo that the card on which the sticky is stuck should appear in the large photo, perhaps obscured by the generously applied red circle?
Look at the small image for what the card covers and compare to line of sight from wall camera (most directly above the pillar) to the supposed card.
Also curious, the sharp focus from card distance all the way to back wall distance. More than curious.
Depth of field from say relatively conservative .4m out to inf. = very small aperture + very hi ISO, + very little noise.