The short answer is: you can't.

Longer answer: you're trying to mix together two completely separate pieces of functionality.

The .schema files allow you to define configurable properties for your plugin in the adapt authoring tool.

The JavaScript code you posted above and in this post controls the behaviour & functionality of your plugin when it is published from the authoring tool as an elearning course and run by a learner.

You cannot use this JavaScript code to affect what happens in the authoring tool. The authoring tool doesn't have any sort of plugin architecture to allow you to change its behaviour.

If you could explain a bit more about what it is you are trying to do it would be easier for people to guide you...