Learning the Landscape: Silvershard Mines

The wording on this achievement is misleading. After testing here is how it works:

Credit for this achievement is given when you are standing in the cart circle and it changes color to your faction "aka controlled by your faction." In other words...
1. You are standing in the circle when the cart arrives from the CENTER Depot as neutral and you take control of it.
2. You are standing in the circle when your faction STEALS the cart from the enemy team by switching control back to your faction.

You DO NOT get credit when the cart when the cart is "captured" into the box at the end of the line.

While sorta cheesy, i don't think it particulary matters in this mode, so you can just stand behind the wall around the center depo where the carts depart, and you will get credit for all 3 carts each time without moving as long as there is no enemy within.