Don't see the Interposer cover in the Market Place

I’m in the process of purchasing all the individual parts for the FW16 and I don’t see the Interposer cover listed any where. Is it included with the Mid Plate kit or is it included with the Interposer it’s self? I plan on ordering the mid plate kit next week so I was wondering about that.

It looks like it’s mounted to the chassis

Thanks. I went back and looked at the Bottom Cover Kit and it’s in the picture. I just bought that last week so I’ll double check it when I unbox it.