Wiring for stock horn

[daveboy]

I hope I am not wearing out my welcome with questions on my new purchase, but here goes my newest:

My '52 half-ton had no horn installed when I bought it. I would like to install a 6V horn, fairly close to original. But, I have no idea where to wire it. I have a wiring diagram, but that is of little help unless I want to completely rewire it. I am trying to find out where the horn actually hooked up to. I am fairly well versed in wiring (I work on office equipment, copiers, printers, etc...), and I would like to be able to wire right into the original wires and use my horn button. Can anyone tell me where to look to hook into this? I take it there is no horn relay and I have some cut and capped wires.

Please help,
daveboy