display of a external content type using SPServices

Hello, i have got the following list which has been created already and it is called NotHereToday this list will be in charge of displaying the name and surname of the people not working Today in the office.  I also have the following code which sumarizes what I want to do but with a different list.. How can I make the following sample display the information I want. Two fields will be displayed preferred_name and surname

/* BIRTHDAYS AND LEAVE */

$().SPServices({
    operation: "GetListItems",
    async: false,
    listName: "TodaysLeaves",
    CAMLViewFields: "<ViewFields><FieldRef Name='full_name' /><FieldRef Name='leave_type' /></ViewFields>",
    completefunc: function (xData, Status) {
    

    
	  $(xData.responseXML).SPFilterNode("z:row").each(function() {

		if ($(this).attr("ows_leave_type") == "A") {
			leaveterm = "Annual Leave";
		} else if ($(this).attr("ows_leave_type") == "O") {
			leaveterm = "Other";
		}
		 else {
		    leaveterm = "Long Service";
		}

		 
var Listofonleave = "<span class='recordofperson'> "+ $(this).attr("ows_full_name") + "<span class='leavetype'>"+leaveterm +"</span></span>";
 
   	    $("#PeopleOnLeave").append(Listofonleave);
	 
      });

	  
    }
  });

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