W123 280ce euro front turn signal help

[mbenz280ce]

I'm trying to get my car back together and get everything working so I can get it back on the road and when this was imported back in 85 it was americanized and my turn signal has 3 wires each. I just got a European Haynes manual and the 3rd wire does not exist in the book. But it is clearly part of the original harness. It is white with a black stripe and on the right side it is white with a red stripe. Can anyone help me with this? I wanted to wire it back the way it should have been because whoever spliced in the extension piece to run to the turn signal did a piss poor job. It works the way it is but was curious about it. Thanks