Hi,
Do you want to add the newly installed node to current cluster or it is just a standalone server which will not be a part of cluster.
If it a single standalone server and want insight database on this server then you need to take the backup of publisher with insight check and restore.
If you want to add newly installed server to cluster then first add the server to the cluster, make sure all the configuration and insight data got syncnorized before you disable the insight on current subscriber and enable it on new server.
We could check the insight database on new server to confirm whether data got syncroinzed or not before disabling the insight option on subscriber.
I would recommand to open TAC ticket to perform this task.
Regards,
Pavan