GadKo 6" Dome Camera Wallmount Bracket

This mounting bracket looks like a fit for my dome camera? I see that there is a hole at the edge as well as the center. However, there is no specification on the size of the hole (my camera wiring opening at the edge of the dome 3.61"), the screw anchor (seems like there is some screw anchors) distances or the wall mount screw distances? Can the seller or other usersprovide these information before I place the order?