Which jumper is slave on my disc drive? I got a Maxtor DiamondMax Plus10 160Gb 8Mb Cache ATA133

Question

I got a Maxtor DiamondMax Plus10 160Gb 8Mb Cache ATA133 Hard Disk Drive <9.0ms 7200rpm last xmas but have only just put it in. There are no instructions, so I don't know which jumper I should select for slave. When I installed it, it didn't even register on my computer, but I don't want to experiment in case it all goes wrong. This is my first time trying this sort of thing