We are connecting at AMS Saturday morning, from Houston to Copenhagen. These are United tickets, but the last leg from AMS to CPH is on SAS (with separate locator numbers, for some reason). I've hunted around to find out about transfer processes, with only some success, because our connection time is short. Which concourse will the United arriving flight use? I gather SAS flies out on concourse C. And for transfer, will there be a security line as well as passport control?