Ember Power Select: select values with Gauge & Selenide

I test an Ember website with Gauge and Seleneide (Java).
-> I'd like to select some values in a Ember Power-Select component. How can I achieve that?

I am able to get the Power-Select component as a SelenideElement object, but setting a value with setValue is useless. Power-Select seems to use an input field that is converted to a ul,li list once I select a value. To be honest, I'm completely lost.
Thx.