Stymied by IDE ribbon cables in a Compaq SR1630NX.

I received this computer in a BUSHEL basket.....IE (HEATHKIT). I have tested the power supply and all the voltages are good to go,and the greenlight lights up. I installed a new A8AE-LE MOTHERBOARD,and installed 4 new DDR PC 3200 RAM sticks which takes the memory to 2 gig. All I really need. I intend to replace the 200gig harddrive with something in the range of a WD 400 GB. At present I am at the wire plug in stage,and I am having difficulty comprehending where the long ribbon connects with respect to the mother board. I think that the blue connector on the ribbon cable plugs into the Blue primary IDE connector on the motherboard,but I am not sure of this. The motherboard has two portsin close proximity to each other one is blue and one is black,and both are. Here is what I think....The DVD-RW plug into the long ribbon and it in turn plugs into the black connector on the motherboard....then the shorter ribbon cable plugs into the hard drive and in turn to the blue socket on the motherboard. I could be wrong that is why I am asking for help.