The nozzles look like they are spraying the front wheels and maybe part of the frame.
I like the way you reversed the boom so it bends when hitting an obstacle, although that prevents them from fully folding.
On mine, I have the tank mounted on the arms to the front casters and the boom stretched out in front of them. Leaving the boom to fold forward, I have a problem if I hit an obstacle that you have cleverly avoided.
You also took a better picture than me!