When you install OCS Server with 'setup.sh', you'll get the files
(Mandatory : you have to set some variable DB_XXXX in z-ocsinventory-server.conf)
All url are defined in ocsinventory-reports.conf with Alias (and Directory).
So you could define in zabbix.conf the Alias for /zabbix (in another file !).
I recommend to learn how to setup Apache using Alias, Directory, Location, VirtualHost, understand Certificate for https, ProxyPass, DocumentRoot, ... you need this not only for OCS ...
Please consider Apache Quick Start, and note OS difference :
- debian like : folder conf-available/conf-enable + a2enconf/a2disconf, same for sites and mod
- centos, redhat like : httpd and not apache2, no a2enxxxx a2disxxxx