install=http://<IP address of your ISO server>/sles15sp4/
## Installer self-updates - only enable ONE option!!!
## from SMT
#  self_update=http://<IP address of your YUM server>/repo/SUSE/Updates/SLE-INSTALLER/15-SP4/x86_64/update/
## from YUM
self_update=https://<IP address of your YUM server>/zenworks-yumrepo/SLE15-SP4-Installer-Updates/?ssl_verify=no
rescue=1