How to add top links to vendor cpanel

Let use the following xml code to your layout file to add a top links to vendor cpanel.

<?xml version="1.0"?>
<layout version="0.1.0">
    <!-- Some code here -->
    <vendors_logged_in>
        <reference name="toplinks">
            <action method="addLink" translate="label title" module="vendorsconfig">
                <label>Configuration</label>
                <url helper="vendorsconfig/getConfigUrl" />
                <title>Configuration</title>
                <prepare />
                <urlParams />
                <position>20</position>
                <liParams>class="setting"</liParams>
            </action>
        </reference>
    </vendors_logged_in>
    <!-- Some code here -->
</layout>

Define the getConfigUrl from helper VendorsConfig

<?php
 
class VES_VendorsConfig_Helper_Data extends Mage_Core_Helper_Abstract
{
  // Some code here
  public function getConfigUrl(){
      return Mage::getUrl('vendors/config');
  }
  // Some code here
}