//build the new object
DataSource myNewDataSource = new DataSource();
myNewDataSource.Name = "Donations";
myNewDataSource.DbType = Constants.DatabaseType.SqlServer;
myNewDataSource.Schema = "dbo";
myNewDataSource.DataConnStr = "Server=myDBServer;Database=myDB;Uid=DBUser;Pwd=DBPassword;";

//add the new data source to the API object
api.DataSources.Add(myNewDataSource);