Need Assistance with MKR Zero and CAN Shield

I have a MKR Zero and a MKR CAN Shield and am trying to find a sketch or get assistance with making one that will take the data coming in on the MKR CAN Shield and save it to a log file on the MKR Zero SD Card. I have the 2 cards piggybacked and when connecting the MKR Zero with USB connector using Arduino i see the MKR Zero but no instance of the MKR CAN Shield is this correct? I have also read that the MKR CAN Shields silkcreening has been mislabeled for the CANH, CANL is that true?
-Brian-