Khadas Tone Board setup with ropieee

i Recently bought a Khadas Tone Board and if i power it via a usb plug from a spare old pi power supply and connect my digione one signature running ropieee from its S/PDIF to the tone boards S/PDIF and the tone boards RCA out to my amps RCA (Cambridge cxa60) i can hear music just as before i added the board but i dont see it in the signal path.

Can someone help me with the correct way of connecting this board and get it working with roon.