ezcontent-8.x-dev/ezcontent.routing.yml

ezcontent.settings_form:
  path: '/admin/config/system/ezcontent/settings'
  defaults:
    _form: '\Drupal\ezcontent\Form\SettingsForm'
    _title: 'EzContent Settings'
  requirements:
    _permission: 'administer site configuration'
  options:
    _admin_route: TRUE