Which configuration file would be used to forward the Splunk internal logs from a search head to the indexer?

props.conf manages source type parsing rules and field extraction configurations, with no role in defining forwarding destinations.

inputs.conf specifies data collection sources on the local host but does not control where collected data is sent.

outputs.conf defines tcpout stanzas that specify forwarding destinations and settings; a search head uses this file to route its internal index data (_internal, _audit) to a remote indexer, enabling centralized log collection and monitoring.

collections.conf defines KV Store collection schemas used for lookup data storage and has no relation to log forwarding.