This is an original from Antminer

P13 to C20 Heavy Duty 20A 12AWG Power Supply Cord Cable For Antminer S21 Series. Shipped with USPS Ground Advantage.

Designed specifically for Antminer S21, S21 Pro, S21 XP & S19j XP miners, this P13 4-pin plug cable, with a length of 5 feet  (150 cm), it is used with Antminer APW17 power supply. It perfectly fits the PSU interface of the miner and supports multiple plugs (C20 / US / UK / EU / P33 / AU). The high-quality P13 power cord provides stable power transmission for Antminers, ensuring their stable operation under high loads and reducing shutdowns and restarts caused by power issues.

This cable will connect from your Antminer to the C19 port of your power distribution unit (PDU).

(If you will not use a power distribution unit (PDU) with this cable, you can instead connect with another additional cable directly to a power receptacle, such as cable type "C19 to NEMA L6-20P".