amplid

I took my old Dvd-rom reader out of my mom's pc to put it in mine. Now I have a question before connecting it. There are two IDE entries on my motherboard, but right now I only have one cable (the broad, grey one, very thin). On this cable I have two connectors, this cable is inserted in the BLUE entry on my motherboard and one of the connectors connects my MASTER drive to my motherboard. Now I know I have to configure the second one as slave, but my question is whether I can connect the second drive to the same cable (to the second connector) or whether I have to get a new of those broad,thin cables and connect it to the second GREY entry on my motherboard??

Greetings,

Amplid