Server Side profile only SSL traffic no authentication

I have a setup where client is authenticated through client ssl profile. From F5 to Siebel server i only want SSL traffic no authentication. How to configure server side profile?

 

1. Does F5 acts as client to webserver or F5 acts as server to webserver?
2. There is certificate and key field in server side profile. why i need certificate if F5 acts as client to webserver?
3. Finally can i use default certificates of F5 for no authentication only ssl traffic if yes how? please help me, I am in need of quick help.