Not sure if I get your question.
I have had a look at the board, and it looks like there are 3 IDE ports giving you a maximum of 6 IDE devices.
If you want to use 2 IDE devices on one IDE connector, then you purchase an IDE cable with two connections.
look here for an example of a dual drive IDE ribbon cable, or here for an example round IDE cable.
If you meant something else, please clarify.
thanks
SE (dave)