Will Adding Material Make My Piece Stronger Against Rotational Force?

[kolleamm]

I'm trying to decide whether to add material to my piece in this location and if it will make it stronger.
The piece is attached to a plate and will experience a horizontal rotational force. Will adding that extra piece in the design make it stronger?

 

[Nidum]

I would be more concerned about strengthening the thin section between the hole and the top radius on the component .

 

[kolleamm]

I'll have to look into that as well, but there shouldn't be much force in that direction.