Custom export fields for WooCommerce Gravity Forms Product Addons

gravity-forms-product-addons-custom-export-fields.php

add_filter( 'gform_export_fields', 'custom_add_wc_order_fields', 10, 1 );
add_filter( 'gform_export_field_value', 'custom_export_wc_order_fields', 10, 4 );

function custom_add_wc_order_fields( $form ) {
	array_push( $form['fields'], array(
		'id'    => 'woocommerce_billing_address_1',
		'label' => __( 'WooCommerce Billing Address 1', 'wc_gf_addons' )
	) );

	array_push( $form['fields'], array(
		'id'    => 'woocommerce_billing_address_2',
		'label' => __( 'WooCommerce Billing Address 2', 'wc_gf_addons' )
	) );

	//Add any additional fields you need included in the export.

}

function custom_export_wc_order_fields( $value, $form_id, $field_id, $entry ) {

	switch ( $field_id ) {
		case 'woocommerce_billing_address_1' :
			$order_id = gform_get_meta( $entry['id'], 'woocommerce_order_number' );
			if ( $order_id ) {
				$order = wc_get_order( $order_id );
				if ( $order ) {
					$value = $order->get_billing_address_1();
				}
			}
			break;
		case 'woocommerce_billing_address_2' :
			$order_id = gform_get_meta( $entry['id'], 'woocommerce_order_number' );
			if ( $order_id ) {
				$order = wc_get_order( $order_id );
				if ( $order ) {
					$value = $order->get_billing_address_2();
				}
			}
			break;
	}

	/* 
	Add any additional fields you need included in the export.   
	See https://docs.woocommerce.com/wc-apidocs/class-WC_Order.html for details on what functions are available to retrieve order information.  
	*/

	return $value;
}

Hi, I am new to this, and would appreciate as much help as I could get. where exactly do I add this code?