The Analytics Connection between different machine with no certificates(SSE)

[meehyeOh]

Hi,
I want to use server side extensions (SSE) for Qlik Sense and Python in a multi-node environment.
So I follow the installation steps 1 and 2, which refer to the URL below on the python server.
URL: https://developer.qlik.com/garden/5af5217ab2606a3c2c1f4d1d
Then I made Analytics Connection through QMC on the Qlik server.
Certificate file path information was not entered because a certificate file was not created.
Edit property HOST = IP address, port number only.
And the Qlik server and Python server communicate normally.
My question is,
Is communication possible without SSL installation and SSE certificate generation?

Additional Information
Using https://~ adrress.
Qlik Server Os = Windows Server 2016
Qlikver = Qlik Sense Enterprise 2019.2015
python server = Window11
python ver = 3.6.8