It has to be a cable which takes audio signal from the 3.5mm jack and feeds it to the USB. All the cables I’ve seen available on the web except the phonak branded ones are intended to take audio from a phone or other device and deliver it to the 3.5mm jack to drive audio in a vehicle or other sound system. Totally useless for this case with Roger On microphones. A source where the audio signal goes in the correct direction at a nice price would be fairly helpful.
WH