I do I create an output of a Matlab system to connect to a CAN unpack block from the Embedded Coder library?

Hello, I'm reading CAN data with a Matlab system block using a call to external C function (coder.ceval), and I'd like to connect the output to the CAN unpack block from the Embedded Coder/Hosts communication library, to enable .dbc file based decoding of the frame. I don't know how to setup a compatible output in my Matlab system.

Thanks.