SSO Secure Login Client to Microsoft certificate store integration based on X.509 certificates

Hi experts

We are trying to implement SSO for SAP GUI based on X.509 certificates. We already have Secure Login Client installed on client PCs and existing Public Key Infrastructure (PKI). User certificates are imported to Windows certificate store on PCs. CA certificate imported also. I have all certificate files if needed.

The question is how to start to using user's certificates in Secure Login Client in Windows PC from MS Windows storage or from .crt files?

Regards,

Valery