The most appropriate method to deploy the LDAP configuration to the search head cluster is to configure the integration in a base configuration app located in shcluster-apps directory on the search head deployer, then deploy the configuration to the search heads using the splunk apply shcluster-bundle command. This method ensures that the LDAP settings are distributed to all cluster members in a consistent and efficient way, and that the configuration bundle is validated before deployment. The base configuration app is a special app that contains settings that apply to all cluster members, such as authentication.conf and authorize.conf. The search head deployer is a Splunk Enterprise instance that manages the configuration bundle for the search head cluster and pushes it to the cluster members. References:

https://docs.splunk.com/Documentation/Splunk/9.1.1/DistSearch/PropagateSHCconfigurationchanges

https://docs.splunk.com/Documentation/Splunk/9.1.1/DistSearch/SHCconfigurationoverview

https://docs.splunk.com/Documentation/Splunk/9.1.1/DistSearch/SHCconfigurationapp