The definition of a cold wallet: a wallet that you will not expose it to online. A wallet from which you cannot send/move funds, you only can receive without even "open" it.
That means you will need to use a MPK (master public key) to generate new BTC deposit addresses and also check the balance of the wallet if you want. WITHOUT EXPOSING IT TO THE WILD WEST ONLINE.
I got you, however create a watch only wallet there are two options, options B tell you to create new wallet although l already create it when l used other guides " create my own cold Wallet" What l don't get it options B which created a entire new seed but it supposed to be import MPK!!