Hi mailee, I've got an Elu OF96E, I don't know whether there is any difference between yours and mine but I've just had a look at mine and if you remove the two screws holding the top cover on and pull off the cover then you will see the brushes. They are held in place with retaining springs which can be pulled back to allow you to remove the brushes. The electrical connection is just a pull off spade terminal.
Hope this helps
Alan