Those horse trailer couplers are kind of a different animal. Kind of a spring-loaded opening cast clamshell deal with a locking collar that keeps it closed. The collar gets pinned in the closed positing to keep it there. I suppose it could be false hitched like any other, but you pretty much have to set it on the ball closed for that to happen.
ALWAYS cross the chains. I had that save my skin once when my tandem axle 16 foot flatbed trailer decided to free itself from the ball. That was a case where the doohickey was frozen open and when I closed the latch it didn’t lose the doohickey completely. Not a fun experience when a trailer gets loose. Luckily it was empty when it happened and the crossed chains saved it.
-Ben
OldJohnnyRude on YouTube