Mower deck MTD Series 660 Spring Question

I have a MTD Model 13BF660G352 riding lawn mower that has a broken spring (P/N: 732-0638) that attaches to the deck raise/lower arm. The other end of the spring is broken so I am trying to figure out where the new spring attaches to?
View attachment Riding Lawnmower.doc

Look for old spring marks near holes on parts 4A & 5 etc.