That's it. Sure there is some load on the parapet, but not that much, as the entire camera assembly isn't that heavy. We made a custom pipe to move the bend to the required spot and lengthen the pipe - to push the cameras out further from the building to look into the entry as much as we could.
And to answer below - as reported above, we needed to push the cameras away from the building to see the entry and cover the parking lot at the same time. We also could not get access to the wall or under soffit to get cable to it under 300 ft. This was the most cost effective method of achieving the end goal. The box was also designed, and cable installed, to add a third camera on the face of the box, if needed.
Another lesson learned - as John has pointed out in his lessons - we try hard not to flat mount dome cameras on the outside walls. We install an arm to allow the camera to hang. Less light issues with blinding from the sun and water sheds better. The smaller domes makes water droplets bigger in the field of view.