I don't understand retail and not OEM. I read it all the time, but i always confuse about them.
Usually if you buy a motherboard, you won't receive only the mobo. It's packed in one box containing installation CD, manual and i think MSI is quite a generous mobo manufacturer. They will give you an IDE cable, FDD cable, SATA cable and maybe others cable or other things. Besides that, if you don't receive the cable, you can get it for less than 10$.
I've never heard of a retail DVD drive or motherboard board not coming with the basic cables. I've bought a few DVD drives (for me, parents, friends, etc) and all came with the cables, same with all the motherboards I've purchased.