Hello ! I have a Traktor Kontrol S2 Mk2 and would like to connect it to my ipad. But the machine does not have an ipad plug, it only has a usb cable (see picture). Anyone knows and could let me know what cable / plugs I will need to connect my ipad to the machine to use it with Traktor DJ2? Is there cable or adapter that I can buy to connect the usb below to my ipad? Thanks! Karim