Power Supply Module - Programmable Controller PLC

What's the name of the component that allows a hot-swap power supply to slot-in and provides all the cables in a 1 4U server? In contrast to

Power Supply Slot Cars · Used Good Working SLICK 7 Slot Car Track or Bench Power Supply wAlligator Clips · HO Slot Car Parts

power plant slot ATX12V · Slightly increased the power on 12 V rail · Increased minimal efficiency for full load from 68% to 70% and defined minimal required PSU efficiencies

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