You are right, sorry for the confusion.
(However, the WP article is not really accurate, nostro accounts can also be our money in our system)
https://www.investopedia.com/ask/answers/051815/what-differe...
As I said, Nostro is also used for own accounts. The account refleting the position of the bank (its own money and assets, not the money or assets deposited by its clients) is also called a nostro, at least in Europe.