Nah, you can figure it out...think outside the box, if this is your hitch, how do you keep any/all tires/wheels happy...?
Whew, I had confidence someone would figure it out...but was startin to get worried though! I guess these were a thing years ago...
My neighbors have an engine powered leaf collection "trailer" that has castors and no pivot at that mower. It ended up ripping the mounts right through the mower frame after 3-4 years of use from all the stress when turning. I think it's dumb design. Not to mention the wide swing the rear of it makes without a pivot point.