I have this wireless mic system: https://www.amazon.com/gp/product/B07XJ6VVBC/
and this cord:
https://www.amazon.com/gp/product/B000068O1K
It seems to plug in perfectly when I place cord into my normal PA system. But all I hear is a buzz. Doesn't seem like any of the mics are sending in audio. And using an old iphone as source with 3.5mm converter to this PA works fine.