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App configs may optionally be directly uploaded to a headset.
We recommend using SideQuest for doing this.
Simply add Add the AppConfig.json in one of two locations:
The app data folder (Android > data > packagename > files), or
The obb folder (Android > obb > packagename)
If using SideQuest you may use the FileManager built into the tool to do this. It will start at the /sdcard path so simply navigate to the given folder and add the file. See the image below for reference.
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Note that you may need to reboot your headset for the new AppConfig.json file to come into effect.