If your panel's like mine...
The LEDs are sleeved in the back by plastic/rubber. Using a needle nose pliers, you can push them out of the panel from back to front. Cut off the two wires as close to the LED as possible, because you'll need all the wire you can to attach the new LED. I looked lots but was unable to find an exact replacement. The closest thing was at Radio Shack. It was an LED with a very small flange at the light emitting end and a screw thread along the LED body. Because even with the flange the LED was too narrow to stay put in the panel, I got small SS washers, colored them black with magic marker and slipped them over the LED body. You can then reinstall the new LED and screw it in place with the included nut. You can then crimp the new LED wires to the existing panel wires from the old LED. You'll need the smallest crimps that Radio Shack sells for this part of the job. When you're done, you'll know what it's like to do brain surgery. You'll definitely want to disconnect shore power when you're doing this, and you should probably turn off all DC power to the panel as well.