They look great to me
I didn't have anything specific including all "aesthetic" details in my mind, so I find this as close to my canon as it gets.
As for the notches: here's a quick sketch of one of access ports, into which this should fit, so you'll see what I thought about.
Click for full size:
In a Cardassian library
or in a Cardassian gallery
"Reagan, it appears, is really only an ardent unionist if the unions in question are in Poland" - Stephen King, Skeleton Crew