If you do not have a side wall that is at a 90° angle to the back wall that you are fixing to, then you can still fix our shelving into your space! Just buy a 415 angle bracket and use it to mount the shelf into a 416 angle bracket.
This bracket MUST be used with the 416 angle wall bracket.
The 415 angle bracket supports the front lip of the shelving and will fit into the side wall bracket. The brackets work together to allow you to pivot the brackets and shelf into the correct position.
You must order one of these and one 416 for every shelf that you are fixing to an angled wall.