The only way I can imagine is to stick it into the pc and feedd your DAC or SB if thats possible..
It may mean you have to move around your computer, or some other item (s) if you wish to pursue using a Hiface.
AS youre seeing now, configuring a system is pretty important too. your config chooses wireless action to the DAC ala SB.
.and yes, youll have to use a soft player like Fubar, WMP, iTunes, JR MC, Monkeys etc to play your tracks once SB is out of the picture.
Sometimes, to achieve better sound, utter convenience fetures need be set aside. But there are other options too I think . Imperical Audio does or did a lot of stuff with SB units . Other places (modders) did too. Maybe they still do.
So either move some gear around physically, or think about upgrading the pieces you currently use instead of adding just another budget piece into the mix, like your DAC, your digi cable feeding it, the DACs pc, preamp, amps, speakers, etc.
I say budget here referring to the Hiface, though I have to say in the right setup, the M2T unit sure does a lot of things right for not much money. Used with Foobar 2K 101, and lossless files it excels past several other media players in fact IMHO, and a few sound cards too.
Personally, Ive not heard a SB feeding a DAC. At $300 per SB I suspect the money is in the Y Fi interface, way more than it is in the digital hardware it contains. So Id bet the Hiface connected to the Benchmark combo would sound superior due to the KS technology the Hiface employs.