Better to make it as TPTY DMM GTL BAY CTA SMET route.
If you want a train connecting SMET with UBL, better would be a different train from BGM to TLGP via UBL as Overnight train.
Or it can be RSA with some MYS/BNG originating train to TLGP. MYS/ SBC TLGP train as RSA to TLGP MRJ train.