Hi,
Yes, this is possible. Use Monitor 1 from Studio as your main (the only one) output. Set this to your Main L and Main Ř output of your soundcard.
Btw: there is a way, how to connect two Buses to the one physical output. In default, this is forbidden in Preferences > VST > Use Momitor bus exclusovely (or something like this). But I would strongly recommend you to don’t disable this option. You will end up with doubeled signal on the output.