Enclosure for 2x HP server power supplies in series with powerpole connectors.
The original enclosure with XT60 connectors and further information such as parts and instructions for building can be found here: https://www.thingiverse.com/thing:4177642
Excellent additional advice on the "correct" way to switch on the power supply can be found here: https://makenotes.de/2020/04/turning-on-a-hp-dps-750rb-server-power-supply/
The author remixed this model.