the '65 wires are just a little different. Note the locations of the individual wires. The brown wire (tail lights) is in a slightly different location than in my '64... no problem. The two holes are connected to each other on the circuitry of the headlight switch, so they both do the same thing. The process is exactly the same... simply move the purple wire to the available unused hole!
Before:
http://turboninjas.com/gallery/d/52896-2/DSC07984.JPG
http://turboninjas.com/gallery/d/52898-2/DSC07985.JPG
Move the purple wire to the empty hole and your plug should now look like this:
http://turboninjas.com/gallery/d/52900-2/DSC07986.JPG
http://turboninjas.com/gallery/d/52902-2/DSC07987.JPG
Have fun and keep on truckin!