This is a heat bed cable management design for the Creality CR-10 series
Besides the tension release on both ends of the cable it uses a standard spiral cable sleeve (available on amazon and others) to protect the heat bed cabling from wear (shortened in the drawings, lengthen to match your cables).
The parts should all be printable without supports and PETG or nGEN are probably the best suited materials to print with
The part that goes to the frame of the heatbed should fit the original screws used for the original strain relief on the bed.
Explosion drawings should assist you during the assembly.
Besides the spiral sleeve will only need a few standard zip locks that fix both cables and the sleeve to either end. The plug side can be directly fixed on the original (aviation) plug provided by Creality.
For additional stiffness you can assembly withone string of filament that can be glued into both ends.
In addition to this cable management the completed tube should be protected from touching the bottom frame of the printer. This can be achieved by either using simple rubber bands tying it to the top bar on the z-axes or alternatively with my stomp! design that uses retractable badge holders for that.
any PLA, PET