Step 1: Log Into Domains.Google.com and select 'Manage'.

Step 2: Select 'DNS' tab on left toolbar

Step 3: Scroll down until you see 'Custom resource records'

Step 4: Add the following A record @ - A - 1h - 54.183.102.22

Step 5: Add the following CNAME Record

www - CNAME - 1h - www.yourdomainhere.com.s.strikinglydns.com

Please note:

Domains google can take up to 48 hours to acknowledge the connection and show as 'secure'. If you have any trouble with your domain connection not working then contact domains google. You may have duplicating records if you had it previously connected to another website. Give them the two records above and they should be able to help you. 

Enjoy your new website!!