Yokotron 7inch Capacitive Touch sound issue

Hi,

Just reaching out to anyone with a Yokotron 7inch Capacitve touch for Mazda 6. I'm attempting to install mine but am having issues with no sound.

I have an 11/2007 MPS with the Bose sound system, Yokotron say I need to connect the amp-con (blue-white) pin 4 on the head unit to pin 10 on the car connector (on-line diagram states is amp-cont) for which I've done however I still have no sound, all buttons and features are working without issue I just have no sound.

Any advise?

Thanks in advance.

Sorry I should add my car has the stock sound system...