Maytag Dishwasher Ring Seal Placement

I just replaced the motor/pump unit in my Maytag dishwasher. I have these two pieces left, the diagram calls them a ring seal, they are made of plastic. It looks like they might fit into the groove on the filter plate? Just making sure. And do 2 of them go in or just 1? I didn’t see one come out when I took out the motor. It is part number 3 on the parts diagram. Thanks.