the wiring in the column is from the turn signal switch, a new switch will have the wires attached [
see here] you just need to fish them down the column - the separate horn wire is attached to the upper mast bearing, same deal, fish it down ... which is to say, when you pull the old wires out you need to attach a wire or string to them so you have something to pull the new ones in with ... see various
signal parts here, there's a "universal" connector available for your missing one, but if you have the harness side or get a hew harness with that side, you can try the parts wanted for the factory one for the signal sw wires
Bill