my mmm is working but where is the USB

[gogglespaesano]

you should have gotten an adapter with a usb on one end and the other end plugs into the plug that plugs into your receiver. If that was a little too confusing...unplug the esc from your receiver and plug it into the adapter cable. There is no actual usb on the MMM itself, you have to use the adapter.

Hope that helps, maybe someone else can explain it better if not.