12v key on source

[Ruckus50gt]

Installing my rear seat delete and I need to tap into a 12v source. I do have b&o system and was wondering if that a would be an option. If not what would be easiest key on source?

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[5doorsoffury]

in the passenger kick there is a beefy 12v constant and a low current ignition. I would reccomend a relay wired from thoes 2. there is a fuse tap in there u can use . im sure someone will chime in. depends on ur ability's but iirc the audio system is data switched so eh. I have used the wiper fuses In a lot of cars that have pts with no heavy ing wires.