First make sure that API access is enabled by going to HiTechAdmin > API or by running hitechcloudcli config get api from the terminal.

WHMCS server needs to be able to connect to HiTechAdmin on port 2087, whitelist both servers: csf -a SERVER_IP.

SSH to your WHMCS server and inside path_to_whmcs/modules/servers run this command to download the module: git clone https://github.com/hitechcloud-vietnam/hitechcloud-panel-whmcs-module.git hitechcloud.

From WHMCS System Settings > Products & Services > Servers click on Create New Server and under module select hitechcloud then add server IP, username and password for the HiTechAdmin.

Create a new group, then create new plans under this group. When creating products, make sure to select hitechcloud for Module and the newly created group