How to upload multicamera setup images

Hi I want to make a setup like here but I would use a custom cameras, which don’t have a GPS built in, so I will write a GPS log on a separate device.

So my question is how should I upload such images? What should be in exif data? Just a coordinates + heading? Should I mark images being captured on a same spot with different cameras somehow?

If you are going to write the gps log with one device, and use that for all of the cameras/images, then I don’t think you need anything extra. Mapillary combined panning would work beautifully

This sort of manual coordinate insertion would actually remove the issues with multiple gps equipped cameras reporting slightly different coordinates, provided you can synchronise the shutters.