Setting a Start Variable of a Battle's Starting Schematic with Script

How can I modify a Machine Start Variable of Battle starting schematic with code? For example if I want to set the scene that is loaded at battle start. I can do this with a global variable because I know how to set this. But it's not clear how to set the Local Machine Start Variable. Thanks, -Mike

        List<Combatant> combatants = new List<Combatant> { selectCardController.connectedGameObject.GetComponent<CombatantComponent>().Combatant };
        newBattle = BattleComponent.CreateBattle(combatants);
        newBattle.settings.ownStartSchematic = true;
        AssetSource < MakinomSchematicAsset > tempAsset = new AssetSource<MakinomSchematicAsset>();
        tempAsset.SetAsset(battleStartAsset);
        newBattle.settings.startSchematicAsset = tempAsset;
        //Maki.Game.Variables.Set("Map_LoadSceneName", selectCardController.loadScene);
        newBattle.settings.variableChanges.variable.SetValue(selectCardController.loadScene, 0); //Doesn't work

        newBattle.settings.ownEndSchematic = true;
        AssetSource<MakinomSchematicAsset> tempAsset2 = new AssetSource<MakinomSchematicAsset>();
        tempAsset2.SetAsset(battleEndVictoryAsset);
        newBattle.settings.victorySchematicAsset = tempAsset2;