Pinted in 10mins, no fasteners needed
You can use one or multiple rubber bands to prevent the bowden tube and cables from getting stuck under the wheels of the carriage and release strain on the bowden tube. 

Creality CR-6 SE Rubber Band Bowden Guide

Cr-6 SE Tubing Guide Part 1.3mf

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4918284.

The clip consists of two sides which are completely identical. Print the included .STL twice to get one clip. You can use 3M or similar tape instead of screws if preferred.

Tested with PLA & PETG

Layer height: 0.2
Ironing not recommended
Support not recommended

Sturdy Cable Holder (cable clip/clamp)

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Creality CR-6 SE Rubber Band Bowden Guide

Sturdy Cable Holder (cable clip/clamp)