Wagon with Copper Chest

My idea is to have a minecart with a copper chest for when they add it. This is so when we connect minecarts to a specific place and you fill the chest, the chest sends the items to the other place, and the Copper Golems save what's inside. When it's empty, it returns unless something prevents it. There should be an option that when you have the chest in the crosshairs (where you select items), there's an option like "Send chest" so it goes to the other point.