You build the project and SDKBox will produce the file.
Location: I think, its created at the assets folder of build folder.
Please take note, that config will be overwritten every time you build/compile your project. So, you better construct the config inside your codes rather than relying on that file.
So, this is my workflow (learnt it a hard way :P)
- build your project
- reimport sdk box changes (by clicking Update on SDKBox GUI, yes it’s annoying we need to reimport every time after a build process)
- compile your app
- update sdkbox config file (all your changes were gone due to compile/reimport)
- compile again