iCal: change link to URL from text to image

Before anyone tries to give an answer: I think I’ve found the answer already.
There is a code part in /classes/em_event.php where the format of the link is given. I will try to make changes in a copy in the theme subdirectory for EM.

Hi all,

almost there but not quite satisfied with my solution.
What did I do:
changed some code in classes/em_event.php
This is the code:

case '#_EVENTICALLINK':
	$replace = $this->get_ical_url();
	if( $result == '#_EVENTICALLINK' ){
		$replace = '<a href="'.esc_url($replace).'"><img src="https://www.cabrioxperience.nl/wp-content/uploads/2013/03/ical.png"></a>';
}

The result is a link from the given image, just what I intended.
BUT: in case of an update this change will be lost. Tried to put this code in the theme directory ….plugins//event_manager/classes
but that does not work.
Any suggestions?

Instead you should use #_EVENTICALURL along with html in your event formats to create a link with an image there.

Thx Marcus!
This is far much better indeed. Did not know this placeholder.
The EM is very flexible, this proves it.
I am very pleased with it and will encourage others to use it.