I can't place it in the building. I can't place it on a node (I've surveyed several with the naturalist) I can't seem to place it anywhere.... Do I have to research something first?
The mineshaft is like an oven/kiln/still, the green entry dot has to be inside the mine building while the rest of the module hangs outside the wall. The ground outside needs to be flat terrain as well, ie not red grid when placing. If you're still having trouble, put up a screenshot and we'll see if we can help further...