Before connecting a converter dolly to a semitrailer using the pintle hook, what position must the dolly be in?

Dolly alignment before pintle coupling: position the dolly directly in line with the first trailer's rear pintle ring (not at an angle); the drawbar height must match the pintle ring height (too high or too low prevents clean engagement); lower the dolly landing legs to prevent the dolly from rolling free during the coupling process; manually guide the drawbar eye into the pintle hook or use a pry bar for final alignment. Coupling at an angle or wrong height risks incomplete engagement that looks connected but releases under towing force.