Turn the base so that the seam is at the back - the holes should go from the centre to the left after the correct turn.
Then assembled with a short M3 bolt from the bottom (with the lowest possible head) and a nut. And 2 washers - one from the bottom of the base, one from the lightbox. The choice of hole to thread the screw and lightwire through is up to you.
The walls and layers of the lightbox are very thin - 2 wall, 0,4 and 0,6 height layers - I printed from PLA and it can withstand harsher treatment, but still careful.
Lightswire https://www.amazon.de/Battery-Waterproof-Outdoor-Decoration-Christmas/dp/B0BNN8MHWS/
Alternative Happy New Year
Happy New Year!
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