geolocation-8.x-3.x-dev/modules/geolocation_yandex/geolocation_yandex.links.menu.yml

geolocation_yandex.settings:
  route_name: geolocation_yandex.settings
  title: 'Yandex Maps settings'
  parent: system.admin_config_services
  description: 'Configure Yandex Maps settings.'