On my 69 Dart, The wires for the horn relay come out of the main harness right at the fuse block just before the harness feed into the fuse box. There's only about 3 to 4 inches of wire on those 3 wires at that point coming out of the taped loom before you reach the connectors that connect to the horn relay
Thanks 416stroker... at least I know where to look now not sure if they cut anything out but one thing for sure I couldn't see anything that looked like a connector by the fuse box. I'll look a little harder !!