pam_opensc auth_method=pkcs15-eid

Hello @all,
I want to use pam_opensc to authentificate against an LDAP-Server:

- What must be stored in LDAP? I think this is the "PEM encoded
certificate"
like in auth_method=pkcs15-eid, correct ?
- What are the options "-A" and "-E" for? How do I use them?
- What is the "scope" of the LDAP-Server?

Could one help me getting this started?

Regards,
Dominik Fischer