I am probably not the best person to answer this question, as I am not entirely familiar either with what MINT and MORE do, or how they interact.
However I did look at the OAI-PMH data from the link. As far as I can see there are still some essential elements missing to make the data usable for Europeana. E.g. I don't see a rights statement (for edm:rights), or a type indication for edm:type. Also the image link goes via a separate application, and a direct URL link to an image is missing, from which a thumbnail can be derived when the data is ingested.
So I think there is some additional mapping (including constant values) required, for which you can use MINT. Then you would need to make it available for harvesting through MORE, as far as I can judge.
But as said, the technical partners should add to or correct my answer.
-- Jef Malliet, Provincie Limburg (B)