Please note that you will need to install this certificate using the SSL manager section of WHM. If you are not an administrator, you will not be able to install the certificate and will have contact your administrator in order to do so.

At the installation screen fill in the correct information in the relevant areas.

Step 1 : In the first box paste your domain / site certificate from the zip file that you received from Comodo.

Install SSL using WHM/CPanel

Step 2 : Fill in the required domain / user / IP address information.

Step 3 : In the middle box paste the correct RSA private key that was generated with the CSR that you sent to Comodo to get your certificate generated.

SSL Private Key in C Panel

Step 4 : In the bottom box paste the correct CA bundle fill for you certificate.
(This is the Intermediate CA certificate in the zip file that was sent to you and is also available from the support section of the website.)

An example of a completed certificate is below

Installing the certificates using WHM/CPanel

Step 5 : Press the "Do it" button

The SSL certificate is now added to your server and assigned to the domain.