Solution

If you want to scan the remote host, uncheck the 'Exclude printers from scan' option within the 'Global variable settings' and re-scan it.

root@kali:~# find / -name openvas*conf
/etc/openvas/openvasmd_log.conf
/etc/openvas/openvassd.conf
root@kali:~#
root@kali:~# cat /etc/openvas/openvassd.conf
kb_location=/var/run/redis/redis.sock