Straight from the manual paper that came with your product:
USB jumper. Located right next to the USB 3.0 port. When loaded, the jumper enables the USB 3.0 port. Remove the jumper to switch the USB 2.0 lines to the J10 (central) miniPCIe slot (USB 3.0 lines remain enabled to the USB port). > This is required if lou need to use two cellular modems > in the device.