Motherboard USB 9 Pin Header Hub Male 1 to 2/4 Female USB 2.0 Splitter Extension Cable, USB 9-Pin Internal Cable 9 Pin Connector Adapter for Port Multiplier (35Cm). This 1 to 4 motherboard USB splitter can be divided into two separate 1 to 2 splitter, which are glued to the position where you want to connect, so as to facilitate the connection and space everywhere.
eBay