The '63 models did not have a detent downshift or electrical switch-pitch feature, so no connector was brought out of the harness like on the '65. The '65 harness feed was a second yellow wire comimg from the wiper motor fuse. That orange wire was probably yellow at one time.
To power up the detent downshift switch and the switch-pitch switches in a '63 model, splice into the wiper motor feed wire. For '63 the wiper motor feed wire is brown.