2020 Corsa amp install

[s58robson]

Can anyone help with install of an alpine DSP amp under the glovebox. I need colour and location of the speaker wires coming from the stereo.

Thanks

Steve

[Cawbuk]

Upgrading the audio system myself.

Any advice on removing dash trim/infotainment system to connect wires to Helix DSP? Or on Big 3, like where is the best grounding point for a second battery ground wire or if I must follow the alternator wire underneath or just bypass easier route by radiator battery to alternator? Any advice on speaker ring adapters?

Thank you,

Charles