v120 power supply pinout

Hi,
I have a sunfire v120 with a digium tdm400p telephone interface
card in it and it has a 4 pin molex power connector like for a
hard drive for its fxs interface. The v120 doesn't have such a
connector, but I think if the motherboard uses the standard atx
pinout, I could splice the connector onto the extra wires from
this kind of adapter
http://www.newegg.com/Product/Product.aspx?Item=N82E16812200064
Does anybody know if the pinout is normal atx or if this would
work at all? This
http://arstechnica.com/phpbb/viewtopic.php?f=7&t=751964 says it
is atx but I haven't been able to find any other information.
Thanks!
Nick Schmalenberger