It can be done assuming you don't mind voiding your warranty and you are really good with a soldering iron.
The connectors will be mounted on a PCB and you will have to replace them with, I am assuming, black molex replacements. The first trick is identifying the molex part number. Note: Molex does not list all parts in the catalog. Also, Molex parts come with different keying per generation of the same connector. By keying I mean where the square and rounded squares are positioned on the connector.
TIP: I have seen a few questions on what the PCIe 8-Pin connector is. This is a special Molex Mini Fit series not listed the female (the bit you push in the back of the PSU) is Molex part number 45587-0003.
I have ordered the plugs to confirm the part numbers are valid. I'll let you know if they don't come out as specified.
Sorry for the diversion. I have a sneaky suspicion Corsair may use non-standard plugs by using old keying, I don't have the PSU in question so I can't help you with the actual connector. Sorry! I have the AX 1200 and it uses the connectors I mentioned above. Note: I specified the female side so you would need to look up the series and find the associated PCB model.
Best of luck!