cc-1.0.x-dev/modules/cc_account/cc_account.links.menu.yml

entity.cc_account.collection:
  title: 'CC Accounts'
  parent: system.admin_content
  description: 'Manage cryptocurrency accounts'
  route_name: entity.cc_account.collection

entity.cc_account_type.collection:
  title: 'CC Account types'
  parent: system.admin_structure
  description: 'Manage cryptocurrency account types'
  route_name: entity.cc_account_type.collection