The whole line, not just the blue part. Right.
Anyway, that there is any problem at all excludes this stuff from being used.
https://www.dropbox.com/s/zzogadmzsfcfu05/Connecting_two_walls_1.mp4?dl=0
https://www.dropbox.com/s/0wntx0gyv1ofa5r/Connecting_two_walls_2.mp4?dl=0
Sorry about that.