Since no one has responded, I'll offer a suggestion (with the caveat of: I have no idea how to do this adjustment, and have never done it)
Can the adjustment be accomplished by placing the transmission into 1st or Reverse, and then setting the linkage up so that the column shifter is very "up and close" to the steering wheel, as if it were actually correctly positioned up there in that 1 o'clock position? Then the mechanic could test shift and fine tune from there. It might take 2 mechanics to work on the car for a few minutes: One to hold the shifter up in the close 1 o'clock position, and one to figure out what that translates to at the transmission, and then force that short little shifter into either 1st or Reverse, but I think once set up, it would all be pretty close AND make more sense as to what needs to be set/adjusted to a certain spot.