I'm trying to assemble an M-T 1015 coupler box and have a dumb question. It's probably been 20 years since I last did this. Looking at the photo below, which end of the "air hose" points up in the assembly when its completed? In other words, should the air hose be positioned like the one on the left (with a small length parallel to the track) or the one on the right (with a long length parallel to the track)? Thank you.