merci-8.x-2.x-dev/merci.links.menu.yml

merci.admin_merci:
  title: 'Merci'
  route_name: 'merci.admin_merci'
  parent: 'system.admin'
  description: 'Administer and configure your Reservations.'
  weight: -9

merci.configuration:
  title: 'Configuration'
  route_name: 'merci.configuration'
  parent: 'merci.admin_merci'
  description: 'Configure your store settings and structure.'
  weight: 10