C2G 27550 DB9 Male Serial RS232 Add-A-Port Adapter Cable with Bracket for Intel Motherboards, Gray (16 Inches) Ensure smooth data flow from either your DB9 Male serial port. This adapter cable connects to the Motherboard or I/O adapter via flat ribbon cabling, and attaches to a port knockout on your computer case.Connector 1: 10-pin IDs dual row