Mr. Duane: you have attracted advice from some very knowledgeable beeks above, every single one has texted good advice on this forum. Good to listen to the fellas.
In my hives, thermal imagining and my own optical camera lets me view inside the hive without opening. The camera is WiFi to my iPhone TESLONG ENDOSCOPE.
So in North Arkansas, just south of you, my bees begin cluster in lower hive next to brood and Honey frames. As winter progresses my bees move up to the top box upon frames of honey directly above the cluster. The bees remain in top box until Spring warmth. I use bottom entrance, restricted from mice 1/4 by 4 inch opening. I use a top winter board with fondant for food and burlap for moisture. Much like your pic. The vent may be open or sealed by the bees. If the vent becomes sealed then I must check the burlap for moisture every 2 weeks or so.
In Fed. I will feed syrup thru the winter board as temp warms. Now this works for me,I have zero experience with top entrance, so take advice from those that do. Normal coldest days are single digits, here, seldom below zero F.
The endoscope is cool, the camera is on a 18 inch flex cable so I can place the lighted lens all the way to the top box from the hive entrance. I need 3/8 inch opening for the hive entrance so I remove the mouse guards for a look into the hive. The cluster of bees is not alarmed, they are to cold.
Blessings