Train one comes in from the portal and stops at a track mark. Locomotive uncouples from the first car. The locomotive pulls away to park at a different track mark. A second locomotive backs up to the train at the trackmark. Since the train came from a portal the card a couple to isn't listed, will "Couple at Trackmark" work? I know I can use the "uncouplez from" command, for the locomotive to pull off with two cars and head to its destination. I'm unsure how to get the second locomotive to the front of the consist. Any help would be appreciated.