Lets build a camelback,, or two.

[e-paw]

My next step was to loosely place the LED into the headlight and fish the leads through the hole in the top of the firebox so that they could be soldered.     You may want to recheck the polarity again before you solder it up, or the lamp will only light in reverse. I used heat shrink insulation to cover my solder joint but electrical tape would work just as well. As you can see from the last pic I left enough slack in the wire to be able to remove the boiler from the frame.

I replaced the boiler on the frame by pulling the slack head light wire back into the firebox (the only place where there is room on this model) and glued the assembly in place. After it dries completely I'll bend the wire into it's final position and fill in the holes with putty.