splide-1.0.x-dev/modules/splide_ui/splide_ui.links.menu.yml

entity.splide.collection:
  title: Splide
  route_name: entity.splide.collection
  description: 'Manage Splide optionset.'
  parent: system.admin_config_media

splide.settings:
  title: Splide UI
  route_name: splide.settings
  description: 'Manage Splide UI.'
  parent: entity.splide.collection
  weight: 21