Hi Danish,
System > Certificate Management > Traffic Certificate Management
Import the SSL certificates.
Local Traffic > Profiles > SSL > Client
Create a separate client-ssl profile for each SSL certificate.
Check the "Default SSL Profile for SNI" option in one of the client-ssl profiles.
Add two client-ssl profiles to the virtual server.
Default SSL Profile for SNI:
Indicates that the system uses this profile as the default SSL profile when there is no match to the server name, or when the client provides no SNI extension support. There can be only one SSL profile with this setting enabled.