I have issue with Google Maps module and Missing Key and Sensor not required on HTTPS

Dear, I have Open Cart estore which goes to SSL https protocol, after that we meet warning in the Browser console for missing Key and Sensor not required. I paste the original warning bellow:

Google Maps API warning: NoApiKeys https://developers.google.com/maps/docu ... o-api-keys
Google Maps API warning: SensorNotRequired https://developers.google.com/maps/docu ... t-required

Can someone help me to resolve this issue, I can't find anywhere in the Open Cart where is the code and eventually to add this key, which I generated from Google Keys.