Still Recording Silence

I got a Reshow cassette player so I can save my mom’s old cassettes as .mp3 files. The recording seems to work fine but I’m recording silence. (Thanks to DVDdoug and Wrecks0 for the tips on my prior post which was closed.)

I found the sound settings on Audacity but cannot figure out how to “listen to this device” in Windows. Assuming that’s the problem, how do I get Windows to recognize the Reshow cassette player?