Identifies whether the reporting temperature/airflow sense card is mounted at the front or rear of the chassis. On chassis models with two sense cards, unlike the 3500 which has only one, this tells the admin which physical side of the box the reading came from. An admin sees csOrionTempAirFlowCard equal to rear(2) on a 9500 chassis and checks rear-facing airflow and exhaust conditions rather than the front intake.