How can I connect a UR22 to the aux input (RCA) of a hifi amp?

Setup question: How can I connect a UR22 to the aux input of a standard hifi amp ? My UR22 is USB connected to my MacBook Pro, and I use it to connect a guitar to the computer to play it on Garage Band. I also use the Phones output to listen to music from iTunes. That works well. But I’d like to be able to connect the UR22 to my stereo to play iTunes music through the UR22, acting as a DAC. The problem is finding the right connecting cables. The line output on the back are only for guitar-type quarter inch plugs. How can I go from there to the RCA connectors on the amp? I’ve looked at many catalogs, and I’ve never seen a 1/4 in to rca connector.

Hi you can add 1/4 inch connectors to any RCA cable hope this helps link below.
https://www.amazon.co.uk/MOBOREST-6-35mm-Female-Interconnect-Adapter-x/dp/B075YRH2P6