That may be an EPS PSU which is a form factor common in servers. Do you have any pics of it assembled (the top half WILL be needed, likely one side is the primary side and the other half is the secondary). It looks to me like btoh of those wires plug into the other half of the board. If so is there an external connector?
EDIT: I saw pictures and it has a 36pin external connector. Unfortunately, there is no pin-out listed that I could find. Which means that you will have to go through the 36 pins and figure out what is what.
EDIT2: One more thing. The EPS standard uses the same 24-pin plug that ATX does plus an 8-pin aux cable. This takes up 32 of the said pins. The rest are likely for connecting peripherals. So just go through and find which pins have 12V on them. One thing I don't like is this one doesn't say how many 12V rails there are. if there is only one you should be fine but if the rail is split, then you end up with only 8A on one rail. My guess is it isn't but who knows. Also, this thing has an insane amount of 5V amperage.