MMI basic+ to 2g retrofit questions

Bbflex

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So I’m retrofitting 2g to my basic+ equipped car.

I’ve tried to read everything I can, I think I’m mostly there, I don’t want to keep ripping the car apart if I can help it.

I’m mainly asking questions in regards to the wiring.

Does the basic MMI screen cable fit the 2g screen?

As I have DSP I have the MOST loop in the boot, where and how do I take the power for the extra units? Do I need to change the connector in the boot too?

To finish the job I’m going to scavenge a breaker, I just don’t want to miss anything out.

Any help is appreciated, thanks.