Tom,
If you are talking about the ditch lights they are 3mm leds that have leads soldered directly to them. You will need to fabricate your own connections when replacing. I just bent the leads on a new one at 90 degrees to the led so the leads extend below the frame and then attach the wires just under the frame. Slip a small piece of shrink wrap over the leads where they come out of the led to prevent shorting. It's tight quarters in the ditch light housing. Maybe you can get a direct replacement from Aristo and save some of the work. I ended up replacing both leds because of a slight difference in hue and brightness between the two. This is common between different led manufacturers.