This is a 3rd generation remix of another user's bed strain relief design. I remodeled it in Fusion 360 from the STL so that I could tweak it.
To use, just print and attach to the 2020 frame beneath your heat bed using 8mm M5 screws and 2020 T-Nuts near your power and thermistor wires, and then attach the cables to the end by running a small (<2.5mm wide) ziptie through the hole around the cables.
Major changes:
Remixed from Hypercube Evolution Heat Bed Strain Relief.
The author hasn't provided the model origin yet.