Clip these into the ends of a Multigrid Divider so that it snaps into the indents on the inside of the bins, or other dividers.
 

Positioning dividers

The divider's have a set of holes in the ends which these divider clips can be placed into (and easily removed).
 

The positions of these depend on where along the bin you want to place the divider:

The green vertical locations use the tall holes and the red and blue positions use the wide holes.

Note you actually only need one clip per end and I recommend using the bottom location. The only exception to this would be if you use divider that is not as tall as the bin, then you can't use the bottom blue clip as it will not reach the indent in the bin so you would need to use the top red location instead.