When using this option, you will configure your clients to hit the PrivateLink JFrog domain name (e.g., yourDomain.pe.jfrog.io) rather than your standard domain name (e.g., acme.jfrog.io).
Set up a private hosted zone for pe.jfrog.io, and create a DNS CNAME record that points *.pe.jfrog.io (or, if you need to reach multiple Artifactories in multiple PrivateLinks, for example, yourcompanyname.pe.jfrog.io) into the PrivateLink's DNS name. Once the DNS record is ready, configure your clients to hit the PrivateLink JFrog domain name (e.g., acme.pe.jfrog.io), so that they reach your endpoint (remember to use a hosted zone here).
As with the custom domain option, how you set it up depends on the type of connection.