| Sounds like the connectors fit over the SCSI id setting jumpers on the back of the CD rom unit. You will have to check with the documentation on how these connect, but if you have two rows of three connections, I would guess that they go together in a 2x3 grid over these pins on your cd rom.
It really depends on how you change the id on the cd rom drive, a lot of drives have three pairs of pins representing 1,2 & 4, and you short (or put jumper on) the appropriate pins to choose the number so id 0 would have no jumpers on and id 3 would have 1 & 2 with jumpers on etc.
In summary, you probably have to remove the ID jumpers from the CD rom unit and repace with these front panel connectors | 
Linear Mode
