Headlight adjustment series 1

Need to seriously adjust the headlight beam on my 1958 series 1 as my front mudguard is getting lit up impressively but not much else!! idiots guide much appreciated!!
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https://www.ilambretta.co.uk/forum/viewtopic.php?f=10&t=4472
carlos fandango wrote:only adjustment is on the two screws at the bottom of the head light rim