I used the blue (USB) 10 pin (9 and blank spot) that comes in the ASUS Q connector deluxe kit.
The dummy pin on my motherboard front panel connectors is in the opposite of a pin hole and instead lines up on the blank spot on the blue connector. I took a 1/16" drill and made a spot for the dummy pin. I used a small vise, and magnifying visor to do it right. Then I just put the case cable connectors on the designated pin/connector layout in MB manual and it works like a charm. Be very methodical and take your time if you are drilling this small hole in this small part.
Asrock FM2A85X Extreme 6 and a Thermaltake Level 10 GTS Black case.
I was just so tired of fighting with those little connectors! Hope this helps someone else.