Access the Web Hosting Control panel within your 1st Domains account:

When you purchase hosting now, the SSL certificate should be automatically issued, but if for any reason you need to add this in again, see the steps below.

1. Login to the Account Manager and select 'Manage Domains & Services'
2. Select the domain name you wish to manage from the list
3. Under the 'Domain Name Services' section select the 'Web Hosting Control Panel' link to login to the Control Panel.

Installing the free SSL certificate:

1. Under the 'Websites & Domains' section in the 'hosting and DNS' tab select the 'Hosting' option.
2. Under 'Security' make sure that the SSL/TLS support tick box is ticked then click 'OK' and wait for processing to complete.
3. Under the 'Websites & Domains' section select 'SSL/TLS Certificates'
4. Scroll down and under 'More options' and 'Install a free basic certificate provided by Let's Encrypt' click on 'install'
5. Ensure your email is noted for 'Email address'
6. Select the 'Include a "www" subdomain for the domain tick box
7. Click 'Get it free' and wait for processing to complete.

The next optional, but recommended step is to setup a redirect from non secure (HTTP) to secure (HTTPS) so that when visitors browse to your domain under non secure HTTP they will automatically be redirected to the secure version of your website. You can use the following steps to enable this:

1. Under the 'Websites & Domains' section in the 'hosting and DNS' tab select the 'Hosting' option.
2. Select the 'Permanent SEO-safe 301 redirect from HTTP to HTTPS' tick box and click 'OK'

The SSL certificate should now be installed on the domain.