Remote Cis installation using rdp

CIS installation blocks the rdp-session immediately, so I lost a connection to the remote computer at once and not able to make a firewall settings for 3389 port opening. How can I install CIS remotely without phisical access to the computer?
Windows 7 is considered for example. I want to have 3389 port is opened by default after installation. What should I do in advance ?

We plan to detect RDP enabled system and offer user to keep port open.
For now you may use some software like team viewer.

Thanks for response!
It’ll be great if the CIS gets this feature .
Sometimes it’s like a little tragedy to lost connection to the remote server.
Some kind of surprise )