Spoiler (click to reveal)
There is one card that shows the notes on a music score. That should give you the order of the notes. Lowest note is on the bottom of the score, highest on the top.
The card with the keyboard shows how the notes correspond to numbers. Lowest note to the left on the keyboard. Highest note to the right.
Combining the the two cards you can get the numbers for all notes. The leftmost note (Letter) on the keyboard should match the same lowest note on the score (same lowest letter). From there on each note upward on the score is one key to the right on the keyboard (ie one number higher for each note).