The Contact Application is configured by three external component plugins: NewUserListener, NewMembershipListener and UpdateUserProfileListener. They use the same target component:

<target-component>org.exoplatform.services.organization.OrganizationService</target-component>  

The Contact configuration is found in extension/webapp/src/main/webapp/WEB-INF/cs-extension/cs/contact/contact-service-configuration.xml.