You should have 6 pins ... from left to right the top 3 are designated pins 1, 2, 3 ... the bottom 3 or designated 4, 5, 6...
To set it up as a Master place the jumper on pins 3 and 6... for a Slave put the jumper on pins 2 and 5 ... Cable Select is pins 1 and 2.
Hope this helps
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Gerald, January 2005