commands-1.x-dev/modules/tasks/tasks.links.menu.yml

entity.task_type.collection:
  title: 'Task types'
  description: 'Manage and CRUD actions on Task type.'
  parent: system.admin_structure
  route_name: entity.task_type.collection

entity.task.collection:
  title: 'Tasks'
  description: 'List of tasks.'
  route_name: entity.task.collection
  parent: system.admin_content