crm_core-8.x-3.x-dev/modules/crm_core_user_sync/crm_core_user_sync.links.task.yml

crm_core_user_sync.config:
  title: Configuration
  route_name: crm_core_user_sync.config
  base_route: crm_core_user_sync.config

crm_core_user_sync.relations:
  title: Relations
  route_name: entity.crm_core_user_sync_relation.collection
  base_route: crm_core_user_sync.config
  weight: 3