Where do you record and update the exact position of cars added to your consist?

The correct choice pertains to the pick-up list, which is specifically designed to document the cars that are being added to a train consist. Recording the exact position of cars on this list is crucial for operational efficiency and safety, as it allows crew members and operational staff to have real-time information regarding the train's composition.

This enables the accurate tracking and management of cargo, ensuring that each car is accounted for, and helps to maintain the order of shipments. The pick-up list is integral for organizing train movements and logistics, making it essential for personnel to update it when new cars are added.

While the consist list provides an overview of all cars in the train and the manifest contains details of the cargo being transported, they serve different functions. The daily report generally summarizes daily operations but does not focus specifically on updating the positions of cars in the train. Hence, when it comes to recording and updating the positions of cars being added to a train, the pick-up list is the appropriate document.