The Maze on the scalp? What was that all about? Theory
So early in the season, Ep. 2 I think, the MiB drags Kissy out of town and cuts off his scalp. This is where we see the Maze drawn on the inside of his scalp. It is not mentioned or revealed how or why it got there.
I am thinking that the reason the Maze was drawn there, and how the MiB knew it was there, is because the MiB put it there. At some point in the past, the MiB discovered this drawing of the Maze. It was etched in the ground or in some wood etc. However, the next time he came back, he could not find it again. Knowing that everything and everyone gets reset, he made a plan to ensure that he could always find it. He takes Kissy, kills him, cuts his scalp and peels it back, tattoos or scratches the Maze on the inside. Folds his scalp back and maybe sows it up. Then when Kissy is repaired and reset, that drawing of the Maze will always be there.