what r the blue plugs in rear compartments for?

[cooa99]

Hi,
I would like to know what the blue connectors/terminal blocks in the left & righ rear compatments(i.e cd changer & subwoofer space ) are for?
Probably pertaining to Europe/UK. I have searched unless i am blind, for the speaker wires in the cd changer compatment but cant find it (I have a MkV IV Nave unit with no DSP,no Amp & no sub)
I cant find anything that looks like the pictures on the forum. Or is it possible that they are not routed via the rear compatments. Another rthing I noticed was that the colour codes on my speaker cables in the door are different from the ones in numerous pictures/explanaitions on the forum

cheers
cooa99