I don't have the model but the 9-pin plug is an easy clue as to the compatibility. The NEM 6-pin plug is the easiest and also most basic plug-and-play DCC interface. While it is really easy to install any 6-pin mini decoder, it only supports the motor and headlight functions. No additional functions or sound. All those need to be hardwired. Also sound decoders do not have the 6-pin interface and are larger than the space available for the decoder.
If you want sound, you will have to modify the locomotive and hardwire the decoder.