I towed a friends HEAVY toy hauler with my little 16K husky hitch. He forgot to take off some kind of spacer plate that is used with his slider hitch. In towing and turning with this spacer thing on ...
Ok, if I were in either the OP or friend's shoes, I'm not sure which side of the argument I would land on.
Since I have no knowledge (until now) of Pullrite and capture plates, had it been me pulling, I would assume the friend should have warned him or prep'ed the kingpin for the OPs hitch.
I would also assume I would have fully inspected prior to hitching up, and hopefully spoken up with "this doesn't look like what I am used to - what's this all about?"