Check the ECU documentation for CANH and CANL wires on the pinout diagram.
Connect CANH and CANL from the ECU to the corresponding pins on the Dash using a twisted wires.
In the ECU CAN configuration choose KMS protocol. Use 1mbit rate or 500kbps.
In the dash configuration software choose ECU > KMS. Also choose the same baudrate (500 or 1mbit).