Accessing functions on external JS in the same object

I've seen some questions regarding this but I wasn't able to make it work in a smooth way.

I've seen recommendations to add an external script into, for example, Script A by doing this:

 var subScript : ScriptB;

Still, when I get to the inspector to select Script B i'm not able to select it (and i don't know why).

Anyway , i've resolved this by using

 gameObject.Find("Object").GetComponent(ScriptB)

I don't have a problem with that as long as I have to reference an script that is enabled in an external object. But right now i have, let's call it OBJECT A.

Inside Object A I've added both components, Script A and Script B.

I have to call a function that's in Script B from Script A. It just doesn't make sense to find "myself" with :

 gameObject.Find("ObjectA").GetComponent(ScriptB)

Since I'm ObjectA...

Is there any workaround this?

Thanks