three d note horns

[Rob Leech]

I am building a 1956 Eldo convertible. About five years ago I came across a 1955 Eldo in the junk yard. I picked a few parts off of it and one of the parts was called a set of "three d note horns". The old man in the junk yard knew his caddys and said they were an available option. He said they are supposed to be tuned to the same three notes that NBC used during the 50s and early 60s when they showed the NBC logo. My problem now is that I cant remember how they mounted. Can anybody help with a picture or something from an assembly manual. My assembly manual doesnt mention the option. Thanks for a reply
Rob Leech