Hello Geez.
I have completed the setup using the method described in the link.
For some reason, RCon could not connect.
I thought it was blocked by the firewall on the server side, so I reset the firewall and the RConPort is now open and available.
I was able to put BEServer.cfg in the Battleye folder, restart the server and rewrite the file name to be active.
Thank you very much for your help.