Help with NPH puzzle?

Thanks so much! So I looked up Cardano and found out about the Grille cypher, I know that much so far, I've tried everything that I could think of that I could gather from the wikipedia page about the cipher, but can't get anything that looks like it's right or legible. I think the problem is that I don't know what I'm looking for? My working theory is on the white card the dashes are the opens and the fulls are the closes. And I would just "overlay" the white card on the black card. Problem with that is it doesn't match up right and I have no clue what to do with the diamonds haha. Any help would be appreciated because I can't solve it if I don't know what it's supposed to come out to be.

/r/playingcards Thread Parent