Little remains from our Zondorf game - it must have been 2008. But I do have the map.
The Russians are to the top.
The Prussians are off map unfortunately, but between Kronoscafe and the rather good Osprey on the battle, no one should be able to claim they can't get enough information to work it out.
It is important in the terrain to get the large wood splitting the battle in half, and to have the Russian baggage splitting the Russian army and making it hard for them to shift reserves over from one side to the other. This makes Fredericks attack point a sensible one without needing special rules.
We also found that the Russian cavalry should be a little reluctant to cross the stream, and deploying them slightly behind it made for a better balance to the game.