Unfortunately, from my understanding, that's the best official response nordeus has given us. They aren't exactly the best at communicating what these things mean, leaving us to figure it either by ourselves or with the help of the player community.
In your matchup, use red arrows on the flanks, since you're focusing the passing down them. DL/DR with red arrows with support the AML/AMR more. Blue arrows on the MC's since your opponent's MC's probably have red arrows if he's running the 4-1-2-1-2 ND.
Against this formation (If I play 4-5-1V), I use defensive/down the flanks/own half pressing/hard tackle/long passing/zonal - force counters/no offsides. Red arrows on DL/DR, AML/AMR and blue arrows on MC's.
What were your orders?