Intel #40) ARRRGH you lost your arm again! Look for the large R5 and R4 signs painted on the wall. In the next room, there's an optional room on the right with Captured's first intel.
Intel #41) In the room where you have to jimmy open the glass door with your knife is Captured's second intel.
Intel #42) BEFORE entering the downed soldier mech suit, turn around to find Captured's third intel.