Have a look a the following lines 32-53 of reporting/reports_main.php:
$reports->addReportClass(_('Customer'), RC_CUSTOMER);
$reports->addReport(RC_CUSTOMER, 101, _('Customer &Balances'),
array( _('Start Date') => 'DATEBEGIN',
_('End Date') => 'DATEENDM',
_('Customer') => 'CUSTOMERS_NO_FILTER',
_('Show Balance') => 'YES_NO',
_('Currency Filter') => 'CURRENCY',
_('Suppress Zeros') => 'YES_NO',
_('Comments') => 'TEXTBOX',
_('Orientation') => 'ORIENTATION',
_('Destination') => 'DESTINATION'));
$reports->addReport(RC_CUSTOMER, 102, _('&Aged Customer Analysis'),
array( _('End Date') => 'DATE',
_('Customer') => 'CUSTOMERS_NO_FILTER',
_('Currency Filter') => 'CURRENCY',
_('Show Also Allocated') => 'YES_NO',
_('Summary Only') => 'YES_NO',
_('Suppress Zeros') => 'YES_NO',
_('Graphics') => 'GRAPHIC',
_('Comments') => 'TEXTBOX',
_('Orientation') => 'ORIENTATION',
_('Destination') => 'DESTINATION'));
In each of the $reports->addReport() statements, you can add in:
_('Stock Location') => 'LOCATIONS',
Note that the PARAMS[] subscript numbers will change in the receiving script - rep101.php and rep102.php.