cant find postgres location (asuming Zabbix is using that postgres)

[Molusco]

Hi, I need to connect with the zabbix database, I asume that is using postgres because I found this lines in history

yum -y zabbix-server-pgsql zabbix-web-pgsql zabbix-agent mod_ssl
yum -y install zabbix-server-pgsql zabbix-web-pgsql zabbix-agent mod_ssl

I have tried multiple commands tring to find the postgres directory without success, I can get data via zabbix api, but I need to connect with the database, and it seems that I need to modify pg_hba.conf to allow my other machine to connect to the zabbix.

I cant even check the status of the postgres service...

Any ideas where or how I can find this file?
CentOS Linux 7 (Core)