Google Maps didn't load correctly.See the JavaScript console

Hi,

My contacts page for the google map has "Oops! Something went wrong.
This page didn't load Google Maps correctly. See the JavaScript console for technical details".

Someone I know uses word press told me to get API key (they have a google map settings tab somewhere). I've got the API key and I've enabled it and logged my domain with google so now where do I put it in opencart 2.0.3.1 please?

Thank you,
Vanessa

<?php // Jquery googlemap api v3?>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js ... "></script>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key="put your AI key here"&sensor=false"></script>
<script type="text/javascript" src="catalog/view/javascript/gmap/gmap3.min.js"></script>
<script type="text/javascript" src="catalog/view/javascript/gmap/gmap3.infobox.js"></script>
<script type="text/javascript">

in the contacts.tpl page of the theme we purchased