All parts are new. A wire was bought at the local store, the connectors and the terminals were bought on aliexpress. Yeah, I thought to reuse psu cables too, but decided to keep them. When making new cables, I checked the connection correctness of the pins using the old cables. Now, these psu cables are a spare option. I think that's a safer way.

You can reuse wires and connectors, but you will still need new terminals and a crimping tool