A holder unit facilitates secure, safe and adjustable connection between an agricultural implement and a draft vehicle such as a tractor. The holder unit mounts to the tongue of the implement and engages a portion of a drivetrain, allowing the drivetrain to rest on a saddle of the holder unit. The holder unit features three adjustability orientations, a fore-and-aft adjustability, a height adjustability and a saddle pivot adjustability. These adjustability orientations are easily combined by the user to achieve accurate alignment for PTO-to-drivetrain connection irrespective of variations between the draft vehicle and the implement drivetrain connector device respective orientations and terrain unevenness.