Installing UI Extensions
Inside your project settings, you'll want to "Add UI Extension" from within the UI extensions page. Here you'll need to provide the full absolute URL to your extension.
The compatibility test will check your extension has the correct signature for rendering inside the application.
Next, once the test has passed, give the field a name, and a description for schema editors.
Next, click Authorise & Install.
You'll then be redirected to your UI extensions overview which will show all extensions added to your project: