Control BT audio modul

Hi, I'm working on a project for my car

trying to get the steering wheel controls so I can control the BT audio module via can bus to at commands tx / rx

have tried searching online but have not found anything that works

there are some libraries that I have tested but with less results

tried to run them here Arduino CAN Tutorial - Interfacing MCP2515 CAN BUS Module with Arduino and -can-bus-tutorial /

how do I add a special can id to the data I have sniffed out and this is what my project looks like

want help with tips on ideas or guidance

mvh Mikael