Integrate plugin into Unreal Engine from Source code

Hello,

I am using a source code build from the Unreal-Engine (NVidia RTX-Branch, as an archvis-company we prefer this version of Unreal because it can utilize much more shadowed lights). 
I am not a programmer or coding specialist, but I am kind of familiar with recompiling plugins for these specific Unreal-Editors. This is not a problem for plugins that normally get installed by the Epic Games Launcher.

Unfortunately I do not manage to get plugins recompiled, that come with their own installers:

In my case these are Axyz Anima and Connecter.

Is there someone out there that could assist me in recompiling the Connecter plugin?

Thank you very much!

Carsten