Technical How about rca output?

[Micke Racestuff]

Hi,
This is NOT about connecting to the radio.
The yellow connector is a 2-channel rca output. I whant to connect an amp and asubwoofer. I have tried a few different connectors and cables but it does not work. The latest one looks like this. Some ideas? The amp turns on but no sound.

 

[murphyv310]

Tried this myself previously.
Not connected on our older sets im afraid.
Not sure about the later U Connect sets though.