Mvsilicon bp1048b2 uart control?

I have a wondom bdm8 amplifier with the bp1048b2 chip on it and they put a 4 pin header plug next to it for connecting it to the PC. Does anyone know how I could go about trying to wire a USB cable to this? I have a 4 pin plug and I was going to cut a USB cable and solder the wires to the plug but I don't know which wires go where. I have the ACPworkbench software already and want to see if I can connect the amplifier. Wondom says the bdm8 doesn't support uart control but yet it has the socket on the PCB and it's labeled USB.
 
Thank you for the link I used it to make a cable and plugged it into the amp without powering it up and it worked right away! I was very surprised that it worked honestly because wondom said that this particular model it doesn't work. I wonder why they would say that and/or not use this in the marketing of the amp? Well I guess I better learn how to use ACPworkbench before I mess up and the amp never works again! Lol
 
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As you can see above the connector in the middle there's +5v, DM, DP, and Gnd printed right on the PCB. Does anyone know what the solder pads above and below the switch are for? One side goes to the Left/Right analog input pins and the other goes to the 2 center tabs of the switch.