Merge pull request #66874 from amolnar-rh/TELCODOCS-1347-fix

Author: adellape

modules/ztp-sno-siteconfig-config-reference.adoc

@@ -48,6 +48,9 @@ For example, `policygentemplates/common-ranGen.yaml` applies to all clusters wit
 For three-node deployments, define three hosts.
 For standard deployments, define three hosts with `role: master` and two or more hosts defined with `role: worker`.
 
+|`spec.clusters.nodes.nodeLabels`
+|Specify custom roles for your nodes in your managed clusters. These are additional roles are not used by any {product-title} components, only by the user. When you add a custom role, it can be associated with a custom machine config pool that references a specific configuration for that role. Adding custom labels or roles during installation makes the deployment process more effective and prevents the need for additional reboots after the installation is complete.
+
 |`spec.clusters.nodes.bmcAddress`
 |BMC address that you use to access the host. Applies to all cluster types. {ztp} supports iPXE and virtual media booting by using Redfish or IPMI protocols. To use iPXE booting, you must use {rh-rhacm} 2.8 or later. For more information about BMC addressing, see the "Additional resources" section.