pm-4.1.x-dev/modules/pm_priority/pm_priority.links.task.yml

entity.pm_priority.settings:
  title: 'Settings'
  route_name: entity.pm_priority.settings
  base_route: entity.pm_priority.settings
entity.pm_priority.collection:
  title: 'Priority'
  route_name: entity.pm_priority.collection
  #  base_route: pm.admin
  base_route: pm.admin
  weight: 10