Hi,
not sure where I got this PDF, it might have been from a forum member or from another source. If I knew I would pass on the appropriate credit because it would have taken a bit of effort to put together. Underlying doc is from the Haynes manual and it does show a pink wire going to the 'light and flasher switch'.
On my RHD '69 F the pink wire comes off fuse F and that fuse is at the front of the fuse box not the rear as it is shown in the diagram so bear that in mind. I never found a wiring diagram that was an exact colour match for my car, there was a lot of trace, trial and error when I stripped it all out and put it back.
View attachment 209321
Joe R