2 screws from the plate that holds the rubber piece over the passthrough. I didn’t toss the machine around when setting up, so I don’t know if they are around inside, or never shipped. This is the front door.
Not looking to send the machine back for this, and the barrier is working. Just a heads up.
I noticed a screw there (securing the metal face of the door) not completely seated, so I took a screwdriver to them and found them all looser than I would have expected.