Your SSL provider gives you the SSL certificate file after it is completely generated. Follow the steps below on how to install it in your cPanel.
Step 1. Log in to cPanel.
Step 2. Click SSL/TLS under Security.
Step 3. Click Manage SSL sites.
Step 4. Under Install an SSL Website, select the Domain from the drop-down.
Step 5. Extract the zip file and open the server certificate file via Notepad and copy everything including —–BEGIN CERTIFICATE REQUEST—– until —–END CERTIFICATE REQUEST—–.
Step 6. Paste the Certificate (CRT) in the box provided.
Step 7. CPanel automatically obtains the Private Key if the CSR was generated from the same cPanel where the SSL is installed. If the CSR is generated somewhere else, enter the Private (KEY) in the box provided.
Step 8. Click Install Certificate.
A pop-up message stating that the SSL certificate has been successfully updated appears. Try accessing the website via HTTPS on a browser. The changes should take effect right away.