I agree with DWVW, the one on the bottom right, but group your subs as close together as possible while still being able to brace the baffle correctly.

Keep the port away from the extreme side of the box. Center the rectangle port in the remaining area where the subs are not. If your port is right up against the edge of your box, your box can see the door panel as an extension of the port and it will change your tuning.