I have cpanel 78.0.41, looking up online I've been told that it is in Security/SSH Access or Advanced/SSH Access but I can't locate it anywhere.
I also tried to locate the terminal but I can't see it anywhere
Simply put, you don't have it.
Here it is in my cPanel, in the Security section:
Some hosts do not allow SSH access. Others will only enable it once you convince them you need it. A few, limited, have some of the controls outside cPanel using their own custom versions. Your cPanel looks full, so I doubt that it your case.
You can contact your hoster's support service and ask if SSH is possible.
SSH access is now one of my top question before signing with a host (unless the client has already signed one before I came on board).