Simple auctions wc vendors pro - proxy by default

functions.php

add_filter( 'wcv_simple_auctions_proxy_bidding', 'wcv_simple_auctions_proxy_bidding_default' );
	function wcv_simple_auctions_proxy_bidding_default() {
		$field['post_id'] = $post_id;
		$field['id'] = '_auction_proxy';
		$field['label'] = __( 'Enable Proxy Bidding', 'wcvendors-pro' );
		$field['type'] = 'checkbox';
		$field['value'] = 'yes'; // This checks the checkbox
		return $field;

}