Script to open a door using a floor switch?

[mstnothing_else]

Hey everyone, i'm really new at this so please be understanding. I'm trying to write a Script to open a Door with a floorswitch. The idea is  to drop a box and activate the switch. I'm using the prefab boxes and the SlidingDoor.Lua.  I saw this video below but the problem is that the script works only if you put the value name in the Script

function Script:Collision (entity, position, normal, speed)
    if (entity: GetKeyValue ("name") == "crate_small") then
        self.component: CallOutputs ("Open")
    end
    
end

but what i want is to be able to assign or to change the object-door-opener from the Script tab, by creating a Script Entry, I just don't know how cause i'm really new at this. Thanks for your help.