A short Question about my X5 retrofit harness

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Hi mentors

I've got a short question about wiring harness i've just received in order to retrofit my 2004 3.0 X5.

As you can see on the attached document, I did not understand what is the biggest black connector on the left side. JPuma'theme seem to not talk about this connector (certainly due to a different product version).

I've clearly identified the BM54 on the right side.

Thanks for your help.

[appy]

Hi,

That big black connector gets in the front.
There will be connected your old Radio connector.

gr. Appy

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Thanks a lot Appy for this precision