how can i make multisig acc through cli wallet?

[optionswallet]

I found this:
unlocked >>> get_prototype_operation account_update_operation
[
  6,{
    "fee": {
      "amount": 0,
      "asset_id": "1.3.0"
    },
    "account": "1.2.0",
    "extensions": {}
  }
]

But the question is how to add another acc, and write on another threshold?
(i mean " transfer acc1 acc2 1 BTS "" true   - its command for transfer. How the command for add account to make multisig account looks like?)