Hello Br’er Shaygetz. a few days ago I saw on the internet the arrangement made on a mantua 2-6-6-2 the case that I had the same problem but once connected the cables to the locomotive and mounted to put it on the way makes a short circuit . I told him that this locomotive was completely disassembled. Could it be because the wheels of the motor car were pushed backwards? I have noticed that the last two wheels one of them has an adhesion spider. In which side does it go correctly in the right or left? Best regards from Barcelona.