Closet Rod Toronto How Do I Install A Clothes Rod In A Closet That Has A Slanted Ceiling On One End?

How do I install a clothes rod in a closet that has a slanted ceiling on one end? - closet rod toronto

I have 2 closets of the bedrooms, each with a slanted ceiling on one end. Clostet As you see, is the tendency on the left side.
I would like to install a clothes rod in each, but later left inclined, there is nothing on the rod holder in the last screw.
What can be done / slanted side of the wardrobe on the left side, so that you can screw the rod holder?