Character Controller Collider Help

Basically i need to make a collider out of the capsule of the Character controller, an extension of it or simple change the shape of the collider.

My character can pick up a box and hold it, what i want is that the character controller collider adapts to the box shape or reacts to collisions a little more forward.

I will attach an image of the situation...

I need that the box collider reacts to collisions as a part of the character controller, or as i said to engrow the front part of character controller, but not the other directions.

 

You could use ray/shere casting while holding a object to check for space for the controller.

This I have done in the past for characters that can push/pull blocks. I capture the push/pull animation velocity from the animator then use ray/sphere casting to ensure there is enough room for the movement before applying the velocity to the controller.

 

I would rather just edit the collider a little so that it is larger forward when I have the cube or make the cube collide as if it were part of the character controller.