So he took it upon himself to modify some cheap Power Over Ethernet ... directly to the connector on the PoE board. Helpfully, the PoE board had all the pins labeled on the bottom side so this ...
It’s also ridiculously cheap, with a PoE injector adapter (RJ-45 plug & 2.1×5.5 mm power jack to RJ-45 jack ... outputs going into the ground and +5V pins on the Raspberry Pi’s GPIO header.