Is what i usually do. Second parameter is the return item value.
Now this isn't without some drawback and that would be that the values in the display items will only popup after the page has loaded and the values have been retrieved by the plugin. It will however save you from changing the item source to a sql query. See how it goes.
$('#P1_ITEM_NAME').apex_super_lov('getValuesByReturn', '101'); $('#P1_ITEM_NAME').apex_super_lov('setValuesByReturn', '999');