How do I associate a NSTableCellView Checkbox toggle-event with its data source?

Environment: View-based NSTableView WITHOUT Bindings.
Problem: Mapping column's checkbox action to its datasource.

Without using IB bindings, how do I associate any particular NSButton/Checkbox action with its respective NSTableView row?

I want to be able to update the checkbox's respective data array with its state.

That is, mapping an array of structs or closures with their 1:1 table entries. Hence, clicking on a 'select'/row updates its respective boolean flag with the data source array.

The following code snippet shows how I populate the UI:

typealias GeoTuple = (geoDesc:String,geoSelected:Int)
var geoList = [GeoTuple]()


func tableView(tableView: NSTableView, viewForTableColumn tableColumn: NSTableColumn?, row: Int) -> NSView? {

    var cellView:NSTableCellView?
    let cellID = tableColumn?.identifier

    guard nil != cellID else {
        cellView = NSTableCellView()
        return cellView
    }

    cellView = (tableView.makeViewWithIdentifier(cellID!, owner: self) as? NSTableCellView)

    guard nil != cellView else {
        print("{ODYInitializePricingProductViewController} *** NO CELL VIEW GENERATED *** \n Check cell identifiers.")
        return nil
    }

    let currentTableColumn = ODYInitPricingTableColumnIdentifier(rawValue:cellView!.identifier!)

    switch currentTableColumn! {
...
   case .geoSelectFlag:
        if row < geoList.count  {
            if let selectButton = cellView?.viewWithTag(1) as? NSButton {
                selectButton.integerValue = geoList[row].geoSelected
            }
        }
  ...
  return cellView
}

Question: How do I trap for a specific NSButton-Check toggle event, and associate/map this event to its respective data source: geoList?