The Red metal extruder (upgrade kit) for Creality Ender 3 has a minor design flaw, there's no way to attach the cable to it.This small bracket fixes this. Loosen the screw a bit, pop the bracket in from the top and fasten again. Done.No extra tools needed.
Note: Make sure to check there's enough room for the hotend to move freely towards both ends, and check the same on maximum Z axis hight.
No support needed during print.