I have to shapes with anchor points perfectly aligned:
But the result is not what I want:
If I select the anchor points and try to join them, I get an error message because they are not open paths. When I use the pathfinder and click UNITE, nothing happens beside that those two shapes are grouped. Shape builder tool is not helpul either. Also, I don't want to expand these objects since I might want to change the stroke weight later on.
How can I join them perfectly so that the lower corner looks ok?
Thank you for your help.