I'm a redhat guy, so I am not an expert on suse, but based on the one suse host I have access to the suse equivalent to
rc.sysinit (on redhat systems) is the script that init calls to kick off the startup process.
Basically you need to check you
/etc/inittab for lines that contain
bootwait and it will be the script specified in one of those lines.
On the suse system I have access to the relevant line in
/etc/inittab looks like this:
# First script to be executed, if not booting in emergency (-b) mode
man inittab for more details.