Move all pieces of your sectional pieces into the desired arrangement before attempting to connect them.
Push the pieces of the sofa together, ensuring they line up evenly in both the front and the back.
Lift the side of the sofa up with the male coupling and push it against the side with the female coupling, allowing the male coupling to slide securely into the female coupling.
Attempt to slide the pieces away from each other or back and forth. If they don't move, you've secured them correctly.
Repeat the process for each section of the sofa.