I'm arriving from NCE (most likely at the B Schengen Bus gate), and departing on US from Concourse C (in business class). Can I enter the B Non-Schengen area to wait at the LH Lounges? Is it possible to go from B Non-Schengen to C airside? I understand that there are two parts of Concourse C, and I can't reach the gates US uses from that LH lounge.