Since I don't have DCC and use Analog DC I removed the decoder and install the two triangular plugs provided to make the locomotive run in DC. The problem I encountered is the headlamp fails to light, thinking the jumper plugs were in the wrong position I reversed which corners, the locomotive ran but still the headlamp failed to light. 

Is this normal operation in DC analog or must it be run in DCC to get headlamp to light?

Your thoughts will be appreciated.

I have an idea to DCC wire the headlamp on the Jupiter & #119?  Frirst, I take the wire off in the rear of the cab since this is used to operate the lamp in DC mode and wouldn't be needed for DCC. I then drill a 1/8" hole with extended bit thru to the front of the boiler to the area of the front pilot holding screw, make any modifications to the area to be able to route the new headlamp wires back thru the hole to the tender and  the decoder.

Any feedback on this procedure would be greatly appreciated.