youtube detailed instructions:
https://www.youtube.com/watch?v=W6UvaSYdeDo
The problem I see here is that projectors can't be center positioned with the toothed washer that comes with the projector headlight. Projectors comes with two metal washers (one and three toothed) but it seems that this headlight is made theway that the H7 bulb is mounted upside down, thus toothed washer can't be mounted so that the tooth will lock the center position.
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