Chasis Air conditioner on 2014 Berkshire 390 BH

[tmmar]

Took my coach to Freightliner in Gaffney during the beginning of this past week for my annual service (oil change, filters, etc, etc). We left a day or so later and went to a campground by the Daytona Speedway for a few days before heading to Disney. While at the campground, I decided to check the oil in the generator which was serviced at Gaffney. While checking the oil I looked at the air conditioning unit and saw that there was what looked like air conditioning filters hanging from the unit. I didn't know how they were supposed to be installed in the unit and what held them in place. This is a picture of the unit that is in the generator compartment. If anyone has any insight as to where these go and how to affix them to the unit and hold them in place, it would be greatly appreciated.
Thanks.
Tom