[ElSpa]

The wire that goes in front just powers the BT module.
The Maserati ecu is powered with the wires from the BMW harness, the ones that he (and us) soldered togheter outside the blue plug.

The reason that they supply the fuse cable is to put the BT module on a separate circuit, so if something happened it will blow its own fuse and everything else will still work (as I belive is normal in every car). They just wanted to do everything by the book, Michael at SRZ is a great guy to talk to and a car engineer.

All things considered, and this being such a great DIY write up, it's not hard at all to get those panels off once you know what tot do. Two hours max for the hole install. On the second car we did everything went so smoothly