New DVDroms with SATA, But where is the Jumper?

I got a new DVDROM with SATA,

but i wonder where can i choose master/slave option?

there is no jumper behind the ROM. So by default is it Slave?

SATA is one drive per cable. Any such settings would be from the SATA (IE 1's master 2's slave) or simply configured in the bios.

So if i install HDD and DVDROM both SATA, then i need to give the priority through the BIOS. So no more physical changes as per SATA is concerned.