This heater bed strain relief was printed in 3DFuel Midnight Black Workday PETG at 257C with no infill with a .4MM nozzle on a Ender 3 Pro running Marlin 2.0.5.3 firmware on a stock v1.1.4 control board using Cura as the slicer.

Ender-5 Bed Strain Relief by derandi3d
https://www.thingiverse.com/thing:3443100/

^ Example of same part fitted to my own Ender 5, to relieve stress that could occur on the heater bed wires.

This cable protector was printed in 3DFuel Midnight Black Workday PETG at 257C with no infill with a .4MM nozzle on a Ender 3 Pro running Marlin 2.0.5.3 firmware on a stock v1.1.4 control board using Cura as the slicer.

Cable protection for Ender-5 by lgaga
https://www.thingiverse.com/thing:3354725/

^ This snaps into the box containing the power supply and the control board where all the cables come into. I have not added this mod to my own printer, as my printer is working very well right now and I have another method of protecting the cables in place already (Don't fix what isn't broken!), however these will be installed on the new printers as all the wiring needs to be removed anyway for the board swap.