After I've printed these excellent levelling knobs (https://www.thingiverse.com/thing:3145976), I needed a way to move the hotbed cable away. As I wanted to have a better solution then use zip ties, I've decided to play a bit with tinkercad. Please feel free to use the result :-)
Add two M3 screws (M3/10mm more than enough) to fix to the case. From the bottom side you can add nuts, there are empty space in the base, you just need to open it.