1u Headphones v2 w/ 7u case + Mixup

I see the new 1u headphone module (v2) has the ability to connect directly to the output of mixup, this is awesome! My question, since I have a 7u case, can I hook up the output of the mixup to the headphones AND the 7u case outs? Maybe just strip/solder two 3 wire bus cables together, would that work?

I would like to know the answer to this too.