Oh, I see. By looking at the other models, a model card is just a text entry. For some reason I thought there was a specific API/form for each field.
Then, yes, it’s just a matter of putting the notes in place - I will contact them via their github - thank you for this suggestion, @RichardWang!
Filed an issue there https://github.com/Helsinki-NLP/OPUS-MT-train/issues/17