I am trying to add DCC to my LGB LCE (90950) train set. I am not experienced with DCC but understand the decoder goes between the track pickups and the motor. I have disassembled the truck which contains the pickups, drive wheels and motor and apart from two pairs of unmarked pins sticking up I see no access to the wiring. I am told that this set is adaptable to DCC but have no clue what do now. Any help appreciated.