How to Configure Cross-Server in Menu

• Main Nodes

Configure [server] in commands

server:
  index: 21
  name: '   &8[&cClick to Cross-Server&8]'
  material: ARROW
  lore:
    - "&f- &7Click to cross-server"
  isEnchant: false
  custom-model-data: 0
  commands:
    - '[server] sub-server-name'