Looks like the way to make that cable work is to cut the clip off and position it to the right side of the 10 pin header
On the TP the clip slot on the casing was widened to allow for either a 6 or 8 pin connector, shame they didn't do that with the HCG-M
I thought of that, but the only way this will work is if you also re-arrange the pinout on the 6 pin connector on the cable. No matter how you plug the PCI-6pin into the PSU 10-pin the voltages would not line-up correctly for the SATA drives.
I wonder what is the part number of the female version of the 10-pin PSU connector so I can just put that on the cable that Antec sent me.