Wildcard SSL Cert

Does anyone know how to include the wildcard ssl on my domain? I don't see an option to do this in the settings.

First, Purchase a Wildcard Certificate from an Authorized SSL Provider. Then Generate a CSR For wildcard Certificate and submit it to your Trusted SSL Provider and get the certificate issuance from them. 

After the above steps download all the CA Bundle Files Provided by the Certificate Authority and Install the Root Certificate on Each Server you Need to Secure Using your SSL Certificate. At last, Install the Intermediate Certificate and CA Bundle File on each Server. You can read this https://cheapsslweb.com/resources/steps-to-install-wildcard-ssl-on-multiple-servers might be helpful.