Output audio capture from another sound card

I have a RP3 with a HifiBerry DAC plus+ and a TEAC TN-300 record player connected via USB. “cat /proc/sound/cards” shows the record player is recognised as “Burr-Brown from TI USB Audio CODEC at usb-3f980000.usb-1.2, full speed”. “cat /proc/asound/devices” shows that it is recognised as digital audio capture.

My question now is how I can send the input from the USB Audio CODEC to the HifiBerry DAC. Anyone a suggestion?