Your response made me search for the instructions. Found them for the modern reissue and it addresses my issue in specificity. Thank you!
Operating your Barrel Car:
The Barrel Car can be operated on any Remote-Control Track section with control rails.
1. Load all six barrels into the center channel of the car.
2. Unlatch the barrel guide at the side of the car, allowing the guide to pivot freely. Refer to Figure 1. Secure the latch when the car is in motion to prevent the barrels from falling off the car.
3. Position one truck on a Remote-Control Track section (available separately) so that its sliding contact shoe is on the right-hand side of the track. Position the track bin next to the car to receive the barrels. Positioning BOTH trucks on the Remote-Control Track section before operating the car will cause a short. Only one truck should be positioned on this section.
4. Press UNLOAD on the Remote-Control Track section’s controller, and a barrel will be unloaded. Do not hold down the UNLOAD button for too long, or the magnetic oil may overheat and damage your layout.
