steihy,
Here is a couple pics of that spring in our 401a.
The long straight end hooks over the little hook as shown in the pic below:
[ATTACH=CONFIG]538129[/ATTACH]
The short end by the spring hooks on the vertical rod seen in this pic:
[ATTACH=CONFIG]538131[/ATTACH]
Just to the left of the collar with the set screw. Behind the face plate.
Hope this helps some.
Joe