I'm trying to install some shelves. They're from an old ClosetMaid system that was already installed in the closet when I bought the house--probably several owners ago. The shelf is mounted to the closet's back wall with screws and plastic brackets, and both the shelf and rail are attached to the closet's left wall with a bracket . However, there is nothing securing the shelf and rail to the wall on the right side. The rail simply attaches to...
Originally asked by Rathwood on Stack Exchange (diy) (CC BY-SA 4.0).