I was actually to get this resolved. In my haste, I glanced over the statement:
" The manifest does not expose any of these services to the public internet for security reasons. If we would like to add endpoints, we can modify the manifest to add these changes, such as changing the service type to LoadBalancer or adding an Ingress resource."
I removed the services from the cluster, added in the LoadBalancer type to the manifest, reapplied the manifest to the cluster, and now have an ELB hostname for successfully connecting to the database.