Step 2: Physically Connect the Boards
Physically connect the USI Development Board to the Arduino Zero by using the following steps:
Carefully insert the development board pins on the underside of the board into the Arduino Zero headers. Make sure that the pins align with the headers, and that the pins aren't bent.
Locate the Arduino Zero Programming Port. For details, see Development Kit Components.
Insert the Micro-USB cable that came with the kit into the Arduino Zero Programming Port, and connect it to your computer. You should see the USI Development Board's status and power LEDs light up.Important: Make sure that the USB cable is plugged into the Arduino Zero Programming port, not the Arduino's native USB port or the USI Development Board USB port.