All fixed.

The spring and pin work together to return the TV linkage when the throttle is let off. If you unbolt the 10mm bolt on the linkage it'll make sense. The arm on the pin pushes the linkage back. The spring goes between the arm and the linkage. You can re-assemble it on the bench and carefully install it with the pin going into a hole in the trans.

Also note: You don't need to remove the pan to change the TV cable but, in my case, I'm glad I did or I'd have not noticed my problem!