Peugeot Elyseo 125 headlight problem.

[map]

Hi. I find it I need advice.
Trying to replace bulb on daughter's scooter.
Looks like a botched job been done in the past. It's the first time had to look at headlight.
Bulb should be a standard h4.
So in my mind that means an end cap.
Yet I have 3 wires with different size spade slide on connectors.
Yellow / blue wire and white have small connectors. Green wire, thinking this be earth, slightly larger.

So can anyone help with which wire goes where.
I don't know how it came out as daughter had to get to work (for which she really needs the bike).

Any help appreciated. I tried to upload photo but my photobucket keeps failing on this phone.

Thanks in anticipation.
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...and the whirlwind is in the thorn trees, it's hard for thee to kick against the pricks...
Gibbs, what did Duckie look like when he was younger?

[uberkron]

The thicker wire is common and the thinner are high/low beam.
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i ride a zip 50 2smoke. It overtakes a hundred times a day.