There are multiple ways, using hooks, template files or functions.
I suggest focusing on em_display_event_locations function located in template-functions.php. You can copy it to your theme and modify to adjust your needs (it will be used instead of the default one).
You may also replace the em_display_event_locations hook, that looks like this in template files:
<?php
/**
* em_after_single_event_title hook
*
* @hooked em_display_single_event_meta - 10
* @hooked em_display_event_locations - 20
* @hooked em_display_event_organizers - 30
* @hooked em_display_google_map - 40
* @hooked em_display_event_tickets - 50
*/
do_action ('em_after_single_event_title');
?>
Then hook into em_after_single_event_title and add your own display.