I designed this bed wire guide to zip tie the bed cable to the lower box. It takes two M3 screws and nuts to mount it and you will have to drill two holes for the screws.

I have extended my bed wires and added a better flexible wire sleeve. I used 18 AWG wire for the heater wires and 24AWG for the thermistor wires. And I used these heat shrink butt connectors to join the wires. https://www.amazon.com/gp/product/B01M0EZBYQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Here is the flexible sleeve I used to cover the wires in case anyone is interested. https://www.amazon.com/gp/product/B074LRSL3H/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

Artillery Sidewinder X1

No

No

0.2

40%

Any material does the trick.