Upside down mount (indoor/outdoor cam)

I have just purchased 6 indoor/outdoor wireless cameras and cannot seem to find out how to mount them effectively upside down. There is a screw port at the bottom however once I turn the camera upside down the software does not adjust nor can I find settings which correlate. If someone could help me this would be appreciated and if not and this is in fact how it’s manufactured then it’s simply not good enough.