This bracket works for the panel kit from Funssor from AliExpress, which has already some holes on the bottom bracket.
"Funssor upgrade Voron 0 V 0,1 acryl pannel kit für Voron 0,1 3D drucker DIY kit" https://de.aliexpress.com/item/1005002596904062.html
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3 x M3x5 heat inserts
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3 x M3x6 (for the bracket to the panel)
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2 x M3x3.5 (for the power supply to the bracket)