Providing the cable you bought conforms to the usual VAG COM KKL 409.1 standard, then ignore the appearance of the pcb etc, it will be oK. The pins are usually numbered on the front board they emerge from, if not check the back side. If not marked then use this diagram of an OBD2 SOCKET.
The plug goes in with corresponding pin numbers. So, looking at the pin face of the plug, wider side at top, Nos 7 and 8 are top left.
Hope this helps.
TC