Assuming you haven’t done this yet I can tell you how I did it
Link at the bottom of this reply shows a picture of the mechanism installed note the angle of the arms
Loosen the nut on the motor
Power up motor place in the closed position
Disconnect power
Install the arm such the angle is similar to the picture ... the loose link should be parallel with the arm link and get the slots in the bracket as central as possible
Do up the motor nut
Connect the light pod and adjust the spigots either side to get the panel gaps correct with the bonnet if the light pod is not fully down don’t panic and use these the to get it as close as possible first
The headlight arm can then be moved forward and backwards on the bracket slot to final adjust
It worked for me _ I couldn’t find a guide when I did mine
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