Iso lead help

Hi, I recently bought a 1.4 SE+ 51 plate MICRA.

I thought I would upgrade the head unit to one with Bluetooth.

When I took the dash apart and removed the original unit the iso cables don't match the ones I picked up from Halfords PC2-76-4

I took pictures of the wires on which I need the iso for.

20170912_160820_zps5zzv16fb.jpg
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20170912_160820_zps5zzv16fb.jpg



Any help would be appreciated.

Thank you.
 
If I buy the Haynes manual would it tell me which wire is which? As it stands they're not same colours so I wouldn't know which is live, earth, front or rear speakers.
 
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