74 Dart Brake Booster Rod-advice needed please

Which way does the Rod face(up or down)? I'm talking about the rod that pushes into the Booster from the brake pedal linkage. If you look at this picture you can see it is shaped like the letter b. The one in my dart is like in the picture(facing down) but when I took the booster out of my Parts car, it was facing up(opposite direction). When I search for pictures, I can find it both ways. I imagine The angle is affected if it's not oriented correctly which I'm worried can damage the seals in the booster.