Mine is at about 1:00 O-clock. It could I guess be in one of 4 locations...up and to the passenger side? It would look like the tube could be mounted in 4 locations, from the picture in the book: http://chevy.oldcarmanualproject.com/shop/1948_51truck/51ctsm0906.htm
Four bolts and four locations...my best guess? Horn wire up. I think you will only get one mounting with that wire "up".


Steve H