how to define digital certificate within a WSDL Connection

I have a wsdlConnection which requires digital certificate.  How does that get defined int xml source code.  Below is what the wizard creates, but it doesn't contain the digital certificate information.  No data is being returned and no error is coming back.

<wsp:Policy xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy">
<sp:TransportBinding xmlns:sp="http://schemas.xmlsoap.org/ws/2005/07/securitypolicy">
<wsp:Policy>
<sp:TransportToken>
<wsp:Policy>
<sp:HttpsToken>
<wsp:Policy>
<sp:RequireClientCertificate/>
</wsp:Policy>
</sp:HttpsToken>
</wsp:Policy>
</sp:TransportToken>
</wsp:Policy>
</sp:TransportBinding>
</wsp:Policy>