Define Mission Goals...help me!

[Predator-78]

Hi everyone, I hope someone can help me. I'm editing a series of missions for a single player campaign. I would like to use the system to define the objectives but I found some inconsistencies and the manual does not explain better how to proceed.
I have put some ships (AI) on the map and four JU-88s equipped with torpedoes that must hit them. In the "Define Mission Goals" section I set a score with a value of -30 if one of the two ships is damaged by a torpedo, -35 if it is instead destroyed.
After the ship has been damaged or destroyed, I close the mission and go to the debriefing section, but I don't see any score with a negative value... how is this possible?
Any suggestions? Thank you.