hey andy to add to your DIY For the harness you can also bolt it to the bolt behind the red cap
theres another red wire there just unbolt the bolt, put the wire around the bolt, and bolt it back on. I'll post pics
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Current: M2CS
Gone but not forgotten: Cayman GT4, M2C, 2011 135i, E83 X3 6MT, 2016 SO M3, 2012 335iS, 2010 135i and 2006 e90 325xi