Megane Stereo wiring. Wires same colour??

[Joe6568]

Hi All. Im new to the forum having just bought my first (not new)Megane. Trying to add an under seat woofer and I have the following problem. When i pulled the stereo I found that all the speaker wires were (4) green and (4) white. Never saw this before in a stereo. No identification as to front. rear, positive or negative. I found a post from many years ago from a guy with the same problem but all that was replied was a link to a wiring diagram which has now been taken down. I have attached a pic (not mine) from that post showing the wires. ANY help greatly appreciated. Thanks. Joe

[DougM]

Google it, mr364megane8. First hit janit.iki.fi.

Section 86A.

[Joe6568]

Thanks for the reply. I already had this, albeit in french. The issue is that the diagram does not show the loom block with the wires so still none the wiser as to which of the wires are pos and neg.