It looks like the connector on the main logic board has broken off of the board and is still attached to the cable. That's why your part looks different—because it has the broken connector still connected to the end of it. If you upload a picture of the connector area on the main logic board we can confirm this.
To repair that you would need to remove the connector from your subwoofer cable and then resolder it to the main logic board, which can be pretty difficult. Good luck!