Don't cut and splice cables. If your PSU is a standard ATX PSU then it has a C14 receptacle and the plug that you connect on the PSU end us a C13 (C13 plug in C13 receptacle). The outlet is a NEMA 6-20R so you need a NEMA 6-20P plug on the outlet end.
Put it together and you need a cable with a NEMA 6-20P on one end and a C13 on the other end.
http://rackmountpdu.com/Category/108-6-20p-to-c13-power-cables.aspxAll PSU cables uses a C13 to "something" plug. The "something" depends on what you are plugging it into. In the US they normally ship with a NEMA 5-15 end because that is the "standard outlet".
NEMA 6-20P is 230V @ 20A max. Continual load (like miner running 24/7) should be derated 20% so 16A continual. You can (assuming outlet and rest of house wire is up to code) safely pull 230 * 16 = 3,680W. If you are crazy like me you run two 30A lines ending in NEMA L6-30R outlets. (Similar but 30A ea and locking) and then connect a PDU to pull up to 11KW of load. The outlet in the photo looks pretty corroded and if it were me I would replace it.
Note there are likely better/cheaper brands but you want a NEMA 6-20P to C13 cable. Of course this information is provided as is and assumes the house/outlet is wired properly and has been properly explained in thread. Thanks, I agree on not cutting yet but I will break down and cut it or a replacement version if it comes down to it. As for the cable, all of my other power supplies use the C13 but after searching for awhile I managed to find it's a C19 on the Lepa G1600-MA as shown here:

I'm not sure I follow exactly on the setup you are running but it sounds awesome and similar to what I had plans to try next if the amp draw lived up to my expectations shown on paper. Any pics of your power setup? Would love to take a look if you get a chance

Appreciate the input, Thanks again!