behringer Flow 8: Send USB In to Mon 1 or Mon 2?


I am wondering whether it's possible to send the USB In (e.g. playback music coming from a PC) to the Mon 1 or Mon 2 Outs.

It appears as if by default it only gets send to the Main mix. There are some related settings in the Routing section of the app.

Unfortunately, as so often, behringers docs are super sparse.

I hope somebody can help.