Here's an example of mounting and umounting a slice on the backup hard drive. In this example, a configuration file and a home directory will be recovered. I'm copying both items to /tmp on the active disk to review.
Assume active disk is /dev/dsk/c0t0d0s0
#cd /
#mount /dev/dsk/c0t1d0s0 /mnt
#cp -p /mnt/etc/someconfig.cfg /tmp
#mkdir /a
#mount /dev/dsk/c0t1d0s6 /a
#cp -pr /a/USERS/esofthub /tmp
#umount /mnt
#umount /a
#rmdir /a
#cd /tmp