Bgm wassel converted ststot

[YAMLAM]

Hi,
I have just bought a bgm 12v DC stator,the wassel conversion,it has 6 wires from the stator,the usual red,green and white, a really thick yellow,a thin yellow with red tracer and a thin black.
My other wassel stator has two yellows the same thickness. There is no wiring explanation in the box just a bgm booklet about pick up height.
Can anyone enlighten me on the extra back wire and why the really thick yellow wire,(plus why the other yellow had a red tracer on it ).
Thanks in advance.
Martyn

[GeorgeS]

Black is an extra earth, I connectes both yellows to the reg. There's some write-up on the MB site.

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[YAMLAM]

Thanks for that. Just need to adjust the pick up height as it's running .