The Carousel has “external-buttons-carousel” CSS class

The buttons have “external-prev” and “external-next” CSS classes

jQuery(document).ready(function() {

	var $prevBtn = jQuery('.external-prev'),
		$nextBtn = jQuery('.external-next');

	$prevBtn.on('click', function(){
		var $owlCarousel = jQuery('.external-buttons-carousel .w-grid-list');
		$owlCarousel.trigger('prev.owl.carousel');
	});

	$nextBtn.on('click', function(){
		var $owlCarousel = jQuery('.external-buttons-carousel .w-grid-list');
		$owlCarousel.trigger('next.owl.carousel');
	});

});