Having your cameras in the right order ensures you get a correspondence between your camera position and the file names

Numbering the cameras using Xangle is as simple as this: Turn on the cameras in the right order, click a button, and you’re done.

It goes like this:

• Make sure all of your cameras are detected in Xangle
• Go in the camera status panel (camera icon on the top-right corner of the dashboard)
• Click on “reorder”
• Turn off all of your cameras.
• Wait until the camera count is zero.
• Then turn on your cameras one at a time in the right order. While doing this, always wait for the camera to be detected in Xangle before turning on the next one
• Once you're done, click on the "Confirm" button.