The Boot Loader goes onto your boot device and as the boot device is your first drive: /dev/sda
) that is where the Linux Boot Loader¹ should go.
In your particular firmware, disks are labelled my their disk brand names and as a Liteon is an SSD, that's where the existing OS gets booted from.
In Linux, disks are named /dev/XdY
where X
can be h
or s
depending on their controller and Y
is a sequential number or letter respectively.
In your particular case /dev/sda
and dev/sbd
are your disks and dev/sda1
is the first partition on the first disk, /dev/sda2
the second partition on your first disk, /dev/sdb1
the first partition on your second disk, etc...
Note¹: It's called GRUB2 of GRUB for Grand Unified Bootloader.