Access different colliders from one one script

Hello! I was wondering if it is possible to access different colliders from one script?

I want to be able to do something like this:

I can determine that if the player enters this spesific collider, then I change a value to something, but if the player enters another spesific collider, I want the value to change to something else.

Is there any way to do this from one script? Some sort of Collider Manager? Instead of creating an "OnCollisionEnter" on every individual box collider?