[Solothurn]

I'm trying to play a scenario my friend and I have devised. It's using custom map #226 (Farmland), and it's an advance mission (USSR advances vs. USA, 1977.) The trouble is, I'm not sure how to set it up so that I (the USSR, the advancing side) set up on the side of the map that doesn't have the water on it--the whole point is that the American player starts with his back against the water. I've tried every possible way I can think of to try and remedy this, but the computer starts me on the shore side of the map no matter what, whether I start the scenario as Player 1 or Player 2.

How can I manually switch the side that I start on? There has to be a simple way to do this.