Как в админке в связях товара вывести вес

public function prepareQueryBeforeCount(xPDOQuery $c)
    {
        if ($master = $this->getProperty('master')) {
            $c->orCondition(array('master' => $master, 'slave' => $master));
        }
        $c->innerJoin('msLink', 'msLink', 'msProductLink.link=msLink.id');
        $c->leftJoin('msProduct', 'Master', 'Master.id=msProductLink.master');
        
        $c->leftJoin('msProduct', 'Slave', 'Slave.id=msProductLink.slave');
        
        $c->select($this->modx->getSelectColumns('msProductLink', 'msProductLink'));
        $c->select($this->modx->getSelectColumns('msLink', 'msLink', '', array('id'), true));
        
        $c->select('Master.pagetitle as master_pagetitle, Slave.pagetitle as slave_pagetitle, Slave.published as master_id');

        $query = trim($this->getProperty('query'));
        if (!empty($query)) {
            $c->where(array(
                'msLink.name:LIKE' => "%{$query}%",
                'OR:Master.pagetitle:LIKE' => "%{$query}%",
                'OR:Slave.pagetitle:LIKE' => "%{$query}%",
            ));
        }
        
        return $c;
    }