2x Client Addon won't open in a Tab

We use the Parrallels Client (formerly known as 2x) and i recently tried to consolidate all my Administration Tools and Connections into the Remote Desktop Manager.
I got everything to work as intended so far except for the 2x Client using its addon.
I managed to start the Terminal Server Desktop with the addon but it always opens as a seperate fullsize Window after the Authentication Screen which is also a seperate Window to begin with.


Basically I was annoyed being stuck with what looks like a basic Windows RDP Session in the Background messing with my Taskbar if I don't minimize it. And with having to move my mouse out of the window and click before i can alt + Tab both of which are the main reasons i use rdp manager in the first place.

Is there a way to open the published Application as a Tab with the option to pull it of as a seperate window like normal RDP sessions or webbrowsers, etc.?

My Current Settings are as follows: