Red arrows: screws - the screw holding the harness-guide in place is accessed from the front of the machine.

Green arrows: unplug/disconnect

Purple circle: clip the zip tie

Green circle: next photo

Yellow arrows: flow sensors - they unclip from the housing or if you rather don't want to - they also have small connectors that you can unplug.

Light Blue circle: pull the pipes out from the housing - it is quite hard, but slow and steady wins the race. Wiggling helps too.

Dark Blue circles: undo the clips using pliers. I just moved the clips about an inch up the hose, easy storage spot. Then just wiggle the hoses off.

Carefully remove the harness, clean and set aside.