Heatbed cable strain relief Wanhao Duplicator i3 (low-profile)

[https://www.printables.com/model/35706-heatbed-cable-strain-relief-wanhao-duplicator-i3-l]


I re-designed Pawpawpaw85's [strain relief](https://www.thingiverse.com/thing:1392575) to have a lower profile so there is zero chance of nozzle coolers interfering at maximum Y-extension when using PEI/Buildtak adhered directly to the heatbed.

This design has an elongated nut-trap so it will fit the Duplicator v1 with bolt hole ~3mm from the edge as well as the v2 and newer models (Monoprice/Coco