Thanks for your message deanishe.
I posted a screenshot of a version that actually does what I want. Only downside is that when I invoke the shortcut I get a pop sound, that you would get when you try to do a shortcut that is not available. This is because when I invoke the shortcut nothing is selected and I try to push the selection into the Script. I'm aware that I'm not using it but else the workflow won't work.
It's a hacky implementation but maybe somebody has an idea how to fix it?