How to get the objects of the selected ITem

Good day

i am new to knockout ,

I am bringing back the data from a control and i am doing the autocomplete and i show the results in a listbox as depicted below

$(function () {
    $("#txtSearchString").keyup(function () {
        $("#lstSearchOptions").hide('fast');
 
 
        if ($("#txtSearchString").val().length >= 3)
        {
            var data = {}
            data.searchString = $("#txtSearchString").val();
            $.getJSON("/SearchCars/SearchCars", data, function (result) {
                //Autocomplete binding
                var viewModel =
                 {
 
                     SearchOptions: ko.observableArray(result), // These are the initial options 
              
                } 
                //item.Model + ' ' + item.Type + ' ' + item.Year
                ko.applyBindings(viewModel,document.getElementById("stSearchOptions"));
                ko.applyBindings(viewModel, document.getElementById("selectedcarid"));
                if (result != null)
                {
                    $("#lstSearchOptions").show('fast');
                }
            });
        }
    });
});

now when the user select something i need to get the selected ID and i also want the Year and this is my HTML

   <select id="lstSearchOptions" data-bind="options: SearchOptions, optionsText: function(item) {
                       return item.Model + ' ' + item.Type + ' ' + item.Year}, optionsValue: 'CarId'"
                    multiple="multiple" size="-1" class="searchOptions">
                </select>
 

and i have this to assign the value

$(function () {
    $("#lstSearchOptions").change(function () { 
        $("#selectedcarid").val($("#lstSearchOptions option:selected").val());
 
    });
 
    $("#lstSearchOptions").blur(function () { 
        $("#lstSearchOptions").hide("fast");
     
 
    });
});

so i can get the ID from here

 $("#selectedcarid").val($("#lstSearchOptions option:selected").val()); 

but have a Problem to getting the year

Thanks

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