Can you provide a link where we can see this ?

Michael,I'll look into this. -Rudi

Is there a url we can see to test ?

DTM does not require you to use a Data Layer or put extra scripting in that data layer to track events.  Be sure to check out the help docs at https://marketing.adobe.com/resources/help/en_US/dtm/  

I've added a screenshot here.  In an event based rule you set the event to "click" and then the tag to "a" with the innerText attribute of the "Get the Map".   Then you would put the 3rd party JS in the section down below in the rule.

you could check the innerHTML value.  or inner text to search for "Get the map"