Looks like that Vaistech has changed the models of their aux audio interfaces. I have the MML unit which has a USB connection to allow you to use a flash drive for organizing your audio content. They now have a new one (don't see the MML anymore) called SL3u-L which appears to be a similar model except I'm no longer seeing the USB connection. Does anyone have this unit and know if you can just directly plug in a USB flash drive to it, or do I have to wrangle some sort of bastardized cording to connect to the RCA inputs?