I am installing two Samsung F1 750s along with my original 320GB that will hold my system. I put the drives in and only 1 showed up. I then looked at the docs and saw that there is a jumper that can be set to Master, Slave or Select Cable (EFI). On a new MP, to set these as drives 2 and 3 (i.e. not as the boot drive), how should I set these jumpers to get both drives to show up?