orange was in security, he probably vented there and since security is close to a vent, he was probably trying to find who to kill or where to sabotage so his partner could kill a person
Answer: red and yellow. They had insert keys as their only common task, so red couldn't have scanned his boarding pass. And in Polus, you can't divert power. At least I don't think you can.
AMONG US RIDDLE #2; THERE ARE TWO IMPOSTORS ON POLUS. THE CREW HAS ONE COMMON TASK, INSERT KEYS. BLACK WAS WALKING AROUND AND FOUND WHITE DEAD IN ADMIN. GREEN WAS SWIPING HIS CARD IN THE OFFICE. RED WAS SCANNING HIS BOARDING PASS. PINK WAS IN LAB DOING SCAN. PURPLE WAS NEAR ELECTRICAL DOING DOWNLOAD. ORANGE WAS IN SECURITY. AND YELLOW WAS DIVERTING POWER TO SPECIMEN ROOM. WHO ARE THE TWO IMPOSTORS? THE ANSWER IS IN THE COMMENTS.