What version of SpeedTronic are you working on?
If it's Mark* II, do you have the Mark* II backsheets? If not, it's possible that someone reading this thread might have them and possibly be able to answer your question.
If it's Mark* II, I think you can edit the thread name to include Mark II in the title (before SpeedTronic) to get a quicker response.
If it's NOT Mark* II you would probably get more replies if you put the version of SpeedTronic in the title.