Ok Gang,
Fitting an Xtrons, one aspect of which is rear DAB.
Removed rear LHS D pillar trim…discovered an unused connect, just 2 wires, one brown yellow, one pink and green.
Scoured the wiring diagram, can find what it is for.
Any ideas….?

Pics below..




 I have a cunning plan.....!

Some models have a speaker mounted on rear pillars.

Its a Guess


 FL2 XS SD4 Auto 2010 2012-2017 (21k - 91k miles) (MY2011)
FL2 Metropolis SD4 Auto 2014 2017- (16k - 84k+ miles) (MY2015)
Metro in its 11th Year of (Extended) LR Warranty / Full LR Service History
(Expensive, but Trouble/Worry free - hopefully?)