Check out the following Image I took when I worked on that 7T32:
The small golden (copper) fork in the center area, in the middle of the two coils, is what they are referring to. This is slightly bent upwards, so when the casebakc is fitted, it will make contack with the piezo-electric disc glued to it. You should be able to see the marks on the disc made by the "fork" on the outer diameter of the disc.
But honestly, I believe the issue is not mechanical (bad contact of the buzzer lead terminal - that's its name). I have hade a few 7t32 and 7t34s withe the same issue, and even if the alarm was working properly, I could only hear an extremely faint "bip" when engaged. This is probably due to the piezo-electric disc. Which btw is not so easy to replace.