Send directly to tls server

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Hi,
I'm using pytak for sending cot event to a server configured in ssl.
On pytak I have added a client certificate and configured pytak with COT_URL=tls://host:port.
When I launch the program I see on the network that pytak send the cot event on multicast address 239.2.3.1.6969 and not to the Tak server configured by COT_URL=tls://host:port.

If possible, I want that pytak send the event on the server by tls port, and after the other client connected to the server receives the events by the server only. This because the clients are connected with routed networks without the possibility to share multicast traffic.

Can you help me?
Thank you