Add an old, no longer existing bank account to my quickbooks

Hi,

I had a BOS business account but they were not very nice to me so I closed that account and changed to TSB (which is my current bank).
Transactions were made with that old (and now lo longer existing bank account) in November and December of 2022.
I can not link to that bank account to get all the transactions as it has been closed. But I do have the bankstatements of all those transactions (not a csv file!).

How can I still add that bank account to my quickbooks and add all transactions manually. As far as I can find and see, I can only link a bank account, but since it no longer exists, I can obviously not link it.

Anyone knows how to add a new bank account manually to be able to manually add the transactions from my old business bank account?