Put a cork in it. Keep it tidy and bug resistant

Yesterday I read a post from a person who was planing to caulk up holes for camera power cords.
I would like to share a solution to plugging holes in the walls for camera power lines. They are simple, cheap, easy to remove and put back and look good if they are painted. The pictures provide details.
Victor Maletic
1%20Cork%20Jig 2%20Jig%20in%20Use 3%20Cork%20Notched