Cheap plugs may have poor contact between the wires and the pins, causing resistive heating resulting in fire. When the pins are embedded in injection-molded plastic, their placement is not adjustable or (if opaque) visible. Better contact is achieved if the pins are crimped onto the wires, or if the wires are pierced by insulating-displacing connectors (IDC).
The !sata bot command on the discord has links. MBP is also working on a guide for the forums.