Basically your blue wire from the sch harness needs to be wired to your adapter for the bose and than wires to the amp or REM turn on from the new head unit. The orange wire can go to your dimmer OR the solid orange wire. the head unit is just looking for power from that wire to dim the unit.
The orange and black wire if I remember correctly does get grounded. I have only done two bose 370z cars.
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