Install TrueCalcu
Database (create it in cPanel → MySQL Databases)
Type
MySQL / MariaDB (recommended)
SQLite (no setup, small sites/testing)
Host
Database name
Database user
Database password
Site
Site URL
Admin URL path
Tip: use something hard to guess, e.g.
tc-panel-7421
Administrator
Username
Email (also used as public contact email)
Password (min. 10 characters)
Install