What is this ASUS Q-connector for (M5A99FX PRO R2.0)

[leftisthominid]

Ok, when I built my computer. I came across this connector, but I was not sure what it was for, so I ignored it...

I have case USB 2.0 ports, but I attached the connector straight to the MB, and I had no problem using them. (It was basically one piece of plastic with holes in the same place as the connector pictured)

Was I supposed to use the connector? Thanks!

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6300 3.5GHz 6-Core Processor (Purchased For $118.49)
Motherboard: Asus M5A99FX PRO R2.0 ATX AM3+ Motherboard (Purchased For $116.98)
Memory: G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866 Memory (Purchased For $76.49)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (Purchased For $59.99)
Video Card: EVGA GeForce GTX 760 2GB Video Card (Purchased For $249.99)
Case: Rosewill R5 (Black) ATX Mid Tower Case (Purchased For $49.99)
Power Supply: Rosewill Hive 550W 80+ Bronze Certified Semi-Modular ATX Power Supply (Purchased For $49.99)
Optical Drive: Samsung SH-224DB/RSBS DVD/CD Writer (Purchased For $16.99)
Total: $738.91
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-01 14:41 EST-0500)

 

[RaDiKaL_]

The ASUS-Q Connector is used to connect the front panel cables (power/reset button, HDD led etc).

The one in the picture is for USB front panel as indicated on it.

It's not mandatory to use but usually it makes it easier to plug them into the mobo.

 

[SchizTech]

The item in the picture can be used as a guide to attach USB headers. If your case uses a USB header which is all one piece it's safe to ignore, but certain cases come (came) with the USB 2.0 header split into 8 separate 1-pin cables. Plugging them into the board in the wrong configuration can damage the system.

It's not necessary, strictly speaking.