These are honeycomb drawer connector attachments. 

They are designed for this drawers:

https://www.amazon.de/dp/B07T6SX9XQ?ref=ppx_yo2ov_dt_b_product_details&th=1

Other drawers could also work. 

You meed M3 screws and nuts.

There are different versions of connector, for reaching the holes of the drawers. Just try which work for you, or design your own ones. honeycomb plate connectors with drawer connector are also included.

There is also a set of connector in one 3mf data for printing all needed connectors for the drawer named updwards.

Print Option:

PETG

20% Infill

If you have any questions, feel free to ask.