How to output capture card audio without it getting caught on desktop sound.

So I do videos and streams on streamlabs and I usually include my discord friends in a call to make things more interesting. I want to be able to output the capture card's audio directly to my headset without streamlabs catching it on the desktop audio mixer.

The capture card I use is an EVGA XR1 Lite Capture Box if that helps. Sorry if this is a question that's already been asked, I've never been to this subreddit before.