Does anyone have a wiring Diagram for adding a MARS light into a 4-8-4, 4449 with DCC??

I cannot figure out which tabs to use on the distribution board, inside! It's a clever set up, but, now I need to add MARS!!

I am trying to install an Ngineering Mars Light. Where do I connect it to the Module?

Please tell me how to program the DCC Decoder inside my 4449 DCC Equipped Locomotive for a MZARS Light. Is it already on the Circuit Board?

Do these Locomotives have a Can Motor, or do just certain ones?