2012 Insignia radio amplifier wiring?

[Tricky]

 

https://www.vauxhallownersnetwork.co.uk/threads/android-5-1-head-unit-for-2011-insignia.442510/page-9

 

I tried the wire in this thread, but it doesn't seem to power the amp, mine is a different colour too, has anyone any idea what the correct wire is? I have a Haynes manual but no diagrams for any of the audio system or associated parts, has anyone got a link to a wiring diagram or have one, I will add that I have removed the whole 600 series audio/nav system in favour of a standalone Joying head unit so i just need to find the onboard aerial amplifier wire to power up?