I had already printed and was overseas by the time I thought of it but while overseas I cut a slit in the back behind each camera, marked in red, and put 10mm wide velcro through it and around the front to hold the camera.
The cutout circled enables you to use the GAMSOD camera with its USB C door open and powered through a battery bank. I filmed across 5 days of play and used battery banks with 2 x 3m long USB C powering the cameras from a single battery bank instead of the supplied batteries. I remove the batteries from the device to try and ensure the camera didn’t overheat, it was still red hot when I turned it off.
The only downside to having no batteries inside the GAMSOD is that the clock is reset every time you take the power out so none of your files are recorded with accurate time in the metadata. The files are still numbered sequentially however, so if you have a run sheet and don’t care about the metadata you can name files later if required. Or you could reset the time every day and keep them plugged in for the duration.
If you are using the GAMSOD outdoors it is likely to overheat if you a very sunny day, as it was red hot to touch just from the battery bank. A cover over the top with reflective tape may be useful.