OPENDATASOURCE Connections

 Hi all,
 In a select sql statement, I have to query 2 databases from 2 different servers. The only way I found to do this, is to call OPENDATASOURCE like this :
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:bdConnectionString1 %>"
        SelectCommand="SELECT * FROM [Table1] t1 left join OPENDATASOURCE('SQLOLEDB','Data Source=servername;Initial Catalog=xxx;Persist Security Info=True;User ID=xxx;Password=xxx').dbname.dbo.table2 t2 on t1.id = t2.id">
    </asp:SqlDataSource>
My question is the following :
Is there a way to connect to the second server without using the full server declaration into the sql statement ? For information, the server connection is already declare into my web.config like that :
<add name="bdConnectionString2" connectionString="Data Source=servername;Initial Catalog=xxx;Persist Security Info=True;User ID=xxx;Password=xxx"
   providerName="System.Data.SqlClient" />
so is there a way to use 'bdConnectionString2' directly ?
If not, is there a way to connect to the second server without entering informations like User ID and Password ? My problem being that I'm not sure it's safe to send this informations directly from the asp.net page.
 
Thank you