Active Directory Import - Which contain should I choose when using LDAP filter

Greetings - I'm setting up my AD import using the new Active Directory Import. I have an LDAP filter that gives me everybody I want. My question is which container should I choose? Do I select all, or try and determine which actually contain the users I want? This is my filter that I've tested by running a search from AD root domain.com -  (&(objectCategory=Person)(objectClass=User)(mail=*)(|(memberof=CN=Seattle,OU=Distribution Groups,DC=domain,DC=com)(memberof=CN=Spokane,OU=Distribution Groups,DC=domain,DC=com))) Thanks!