JavaScript via IOL and Google Maps API

Hi,

It has always been a little confusing to me as to how the IOL injects our script onto the page.

In my current project I am integrating Google's Reverse Geocoder, which takes a latitude and longitude and turns that into an address, but I need to be able to reference their API as a script src. I know what the URL is, but how do I append this script src to my code?

Thanks