Routing monitoring question


I’m using a UR44 Steinberg soundcard and I want to send the output of my tracks to the input of the card (without using cables) so I can use two headphones mix within the virtual mixer board of the card.

So I have to send in a way the « Audio to » to an « Ext. input » but it’s not possible? Or else (with send or buses)…

Is it possible to do this (or maybe the problem is that the UR44 virtual mixing board don’t allow this possibility)?

Thanks for your help!