Schematic Manual shows two different locations, but all three are above ceiling panel at station 750 (slightly right of center-line).
TS186 AFT DUCT TEMP BULB (STA 770 WL 305 LBL 18)
S23 AFT CABIN ZONE DUCT OVHT (STA 753 WL 302 LBL 17)
TS179 AFT CABIN ZONE DUCT AIR TEMP SNS (STA 770 WL 305 LBL 17)