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The NU DDW-061/081 Optical Drives used the Philips Nexperia PNX7850 Chipset. The Philips Nexperia PNX7850 Chipset Optical Drives used the Jumper Setup positions as depicted in the below .jpg image ->
In the above posted .jpg image the Jumper is in â€˜Centerâ€™ position which is the â€˜Slaveâ€™ position. From Left to Right the Jumper positions are as follows - CS (Cable Select), Slave, and Master. If you if you desire the â€˜CSâ€™ (Cable Select) Jumper position you would put the jumper in the Left position. If you desire â€˜Masterâ€™ position you would put the Jumper in the Right position.