Replace Assist/SOS with USB C and A ports

I've got an '06 3.0i Z4 LCI and I wish to replace the old SOS/Assist button with a usb drop in C and A port power unit I got from Falkmfg.com. Before I pull it out, does anyone know if there are hot and ground wires in there as I know initially those were to contact dealers for on road assistance. Thanks in advance.
 
Is the sos button a USA only thing? I’ve only ever seen a coin try in this slot. I wonder if uk cars have wiring for this, I don’t remember seeing any though.
 
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