Samsung SW-248BRNS - Manual (Page 10)

Connect a jumper to the rear side of the CD-R/RW.
If the jumper is connected to MA (Master), it will work in the Master mode.
If the jumper is connected to SL (Slave), it will work in the Slave mode.
If the jumper is connected to CS (CSEL), you can control the device by using the host interface signal
CSEL. (In general, connection to MA is recommended.)
Connecting the audio cable from a sound card
Connect the 4-pin audio cable between the sound output terminal on the CD-R/RW drive and the audio
input terminal on the sound card.
For clearer sound, use a digital output terminal.(Available only for the CAID that supports digital output)
This may not be available for general sound cards.
If there is two CD-R/RW drive, select MA (Master) / SL (Slave).
a : Master Drive (Choose the MA Jumper) b : Slave Drive (Choose the SL Jumper)
c : Hard Drive
d : MainBoard
e : Primary 1 f : Secondly 1
Installing a jumper on the master/slave select terminal
Setup