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
3 x M3x5 heat inserts
3 x M3x6 (for the bracket to the panel)
2 x M3x3.5 (for the power supply to the bracket)