I see you have 2 good diagrams already, but I'll add my 2 cents. When I converted to a 78-79 Bronco factory tilt column, I used the info on BC Broncos tech page as reference. Instead of splicing wires together, I got new, correct wire ends @ an electronics store for the 69 style plug and installed those ends on the column bare wire ends. I cut the half moon connector off. Working like a charm.
Here is the tech page BC Broncos....
http://www.bcbroncos.com/techtips08.html
VW....I see you mentioned the horn wiring issue. I believe mine is still working without a relay?....late column in 69 Bronco. If I'm not mistaken, the power for the horn passes thru the horn button circuit on it's way to the actual horn...horn button I'm using is 2 wire.
Also, I see you mentioned using the column mounted hazard switch. This I would like to do because I'm out of real estate on my dash. My 69 currently has the dash mounted hazard pull type switch and a second flasher relay behind the dash. I tried to figure this out when I installed the column but never finished. The red/white stripe wire in the column is for the mounted hazard switch. My existing 69 hazard switch has 2 wires going to it. Which single wire do you hook to the column hazard switch single wire....and what about the second flasher relay...I'm guessing it's deleted since the column mounted hazard switch ties into the turn signal circuit? Thanks in advance for helping me figure this out.