Let's create a new file called
Location-Mod.php and stick it into your vtiger root directory
(vtigercrm by default):
<?php // Turn on debugging level $Vtiger_Utils_Log = true;
setRelatedListtakes as arguments the module instance that you want to link from (in this case, Locations), the label that you'll use in the listing of Potentials (Potentials), and the buttons to include ...