How can I change the damage of siege towers?

Hello everyone, I'm a beginner modder, and I recently got the idea to change the parameters of siege structures. I managed to change the catapults and ballistae. But I don't know how to change the archer towers; I've searched almost all the game folders, but I can't find the parameters for the archer towers to change the damage. I would really like to reduce the damage. I know that by default, the central archer tower deals 70 damage, and the left and right towers deal 50.