3U Power Connect Module
3U Power Connect Module 2HP, Waveform Magazine DIY Project #7
Part of a 1U/3U pair of modules to share power from a 3U rack to a 1U rack
https://waveformmagazine.com/1u-3u-power-connector-modules-6hp-2hp-waveform-diy-project-7/
This Module is currently available.
$34