A typical driver to motor connection diagram can be found Here (pdf). This may be helpful for determining ELCO connector part numbers.
The APS standard ELCO connector pinout (html)
The APS standard db9 encoder connector pinout (html)
The APS standard db25 connector (controller -> driver) pinout (html)
The APS standard motor cable (cable -> Elco connector) wirelist (html)
Unipolar/Bipolar series connection adapter pinout (html). This adapter will allow a standard motor/cable/drive connection to be converted to a series connection for use with a bipolar (often microstepping) drive.