This is a lot easier to do if you unplug the 10-pin SL connector from the front of the hotend, and remove your PTFE tube from the PTC fitting. Both are indicated by the red arrows in the picture.

Carefully pull the power/thermistor splitoff down towards the arm of the hotend board and zip tie in place as indicated in the photo.

Make sure your cables are still plugged in properly under the flexible boot. If the bend is too tight, you might need to carefully snip a little of the boot off to give yourself some more room to bend the wires in place.