In front of the passenger seat,above the parcel shelf,there should be a pull down plastic access panel.Should be room here to hide something.It is possible to use the black box wiring,but this is likely to be a permanent battery supply and anything connected to it would cause a battery drain.If you are not sure what to do,then consult an expert.Incorrectly wired add-ons can cause havoc to modern day car electronics.
That's very helpful thanks! Why would there be a problem using the black box wiring to power the USB? As in, if the black box is running on it fine then why can I not swap this to power the USB or is it because the USB would draw more power? Many thanks.
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