Perhaps inside Engine.ini (or Game.ini) in your project’s Saved/Config/[platform] folder.
As a matter of convention I’m not 100% sure, as most of the .inis end up loaded, but there’s probably a “proper” place for it. 
Perhaps inside Engine.ini (or Game.ini) in your project’s Saved/Config/[platform] folder.
As a matter of convention I’m not 100% sure, as most of the .inis end up loaded, but there’s probably a “proper” place for it.