You can use multiple connection string like that just give name at codebehind what ever connection you eant touse.. :)
<connectionstrings>
<add name="Connection1" providername="System.Data.SqlClient" connectionstring="Data Source=Server Name;Initial Catalog=Database1;User ID=Usename;Password=****" />
<add name="Connection2" providername="System.Data.SqlClient" connectionstring="Data Source=Server Name;Initial Catalog=Database2;User ID=Usename;Password=****" />
</connectionstrings>