Create a new search atribute for display events in location map

I write the next code, but I’m not sure where can I put it. I added it to the bottom of events-manager/buddypress/bm-em-groups.php only for testing.

function bp_em_sakya_events_build_sql_conditions( $conditions, $args ){

	if( !empty($args['skperiodo']) && is_numeric($args['skperiodo']) ){
		$conditions['skperiodo'] = "( DATEDIFF( event_end_date , event_start_date ) = $args['skperiodo'] )";
	}

	return $conditions;
}
add_filter('em_events_build_sql_conditions','bp_em_sakya_events_build_sql_conditions',1,2);

function bp_em_sakya_events_accepted_searches($searches){
		$searches[] = 'skperiodo';
	return $searches;
}
add_filter('em_accepted_searches','bp_em_sakya_events_accepted_searches',1,1);

function bp_em_sakya_events_get_default_search($searches, $array){
	if( !empty($array['skperiodo']) && is_numeric($array['skperiodo']) ){

			$searches['skperiodo'] = $array['skperiodo'];
	}
	return $searches;
}
add_filter('em_events_get_default_search','bp_em_sakya_events_get_default_search',1,2);

Filters than run functions need to be added to the functions.php file of your theme.

This might help:
https://wp-events-plugin.com/tutorials/create-your-own-event-scope/