Above the Task Object effect is 'Create Object' and below it is 'Declare Victory'. Tasking objects is quite simple when you know how. The easiest way to move a unit from one place to another is to click on 'Set Object' and then click on the unit, and clic kthen on 'Set Location' and then click a place on the map where you want to move the object.
The other menus on the Task Object effect allow you to move all objects of one type, all units in a set area, etc. You can experiment with these.