I have the seedstudio CAN BUS shield. There are two white connectors on the top, one marked Serial and the other marked I2C. I have been trying to find a cable that fits these two connectors but without any luck. Can someone kindly point me to the proper name of this cable (other end of cable can be simply 4 wires)? Or better yet, give me the URL of what I need? Thank you for your help.