help!! where to put my returns on my tank

[Dragon Hunter]

I just got an acrylic tank with center over flow. Im debating where to put he retuns on the tank. can someoen tell me advantage or disadvanges between the 2 locations.

Option A. Put it on the 2 sides of the internal overflow box.

Option B. Put it on the 2 sides of the tank

 

[Full Metal Gundam]

option B would be my choice

 

[LiquidWare]

2 good options ... For option A, I would point the outputs to the sides & for option B, I would point the outputs towards the front.