OpenRoads SUDA Drainage Structure Cell

We have a request to show grates on a 24in side drain MES. This feature displays automatically on 30in side drain MES and larger. I have tried to edit the feature definition of the 24in side drain to select the prototype option for grates but can't get the cell itself in plan view to change. Is there a way of editing the cell directly or a property that will display the grates in plan view and 3D?