Cube Connectors
thingiverse
http://www.domu.co.uk/16x-interlocking-storage-shelves-make-into-any-size-shape-organise-shoes-clothing-toys Connectors for cube storage like this, might fit into to other wire cube storage too.
Download Model from thingiverse
With this file you will be able to print Cube Connectors with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Cube Connectors.