Slide the rubber boot up off the 10 pin connector as shown in Pic 1. Unclip the 10 pin connector from the SE300 board.

Slide up the rubber boot from the power connector and the thermistor plug as shown in Pic 2. Unplug both of these connectors and this will remove the whip from the hotend.

Unclip the arms from the hotend platform and remove the hotend from the machine.