[Theme: Hatch] Adding Meteor Slideshow as header

Hi,

I’m new to building websites, and like to figure things out on my own. However, I’m stuck on changing my header into a Meteor Slideshow on the Hatch theme.

I need to add the follow line to my coding (appearance -> editor)
<?php if ( function_exists( ‘meteor_slideshow’ ) ) { meteor_slideshow(); } ?>

But I can not seem to figure out where I have to put it, I tried replacing multiple lines in the header.php section, but it is not working.

Can anyone help me out?