Use this screen to:
specify the path to the trusted certificate for each keystore
specify the path to each keystore's private key, the password for the private key and the path to the Identity Certificate for the private key.
When you click in the Trusted Certificate, Private Key, or Identity Certificate fields, a browse icon appears to the right of the field. Click this icon to browse to the appropriate file.
"Understanding Identities, Policies, Credentials, Keys, Certificates, and Auditing" in Application Security Guide