How to clear a Terrain Tile per Scripting, while still matching neighbors?

Hi everyone,

so far I'm using the set_cells_terrain_connect method to place Terrain Tiles into at TileMap while matching the Autotile Logic. This works well and as expected.

However I'm not sure how to "clear" a Terrain Tile, while updating the neighbors accordingly. The erase_cell method does clear the Cell, but the neighbors are not updated accordingly. My guess is, that erase_cell removes the Terrain information from the cell entirely. How to place an empty Terrain cell?

Just in case, my TileAtlas looks like this. I'm also not sure if the empty Terrain needs the Bit in the center or not