Ember js, HTMLbars: use component as param of a component

I want to to something like this:

the component helper does not work here, I tried this

I also tried to make a helper rendering my component but failed. Seems that all answers I found are outdated like this one how can I invoke an ember component dynamically via a variable?

To be more specific for my usecase. I use tooltipster and want to render a tooltip with a button init.

Thx for every input!

Cheers Pi