Connections behind blind caps

Hello guys, from boredom I looked at my indoor space a little bit closer to get inspired by what I can change slightly. There are blind caps on all of me. I agreed on them and see there, there are apparent connections. But for what? The blind caps I mean are the ones under the clock (with other models where the BC is) and above the wheel where you turn on the fans. What are these hints? If necessary I like to take photos of them. Greeting from the north Mario