1990 944S2 Coolant leak

Vehicle Information: Model(924/944/968): 944S2 cabriolet 5 speed; Year: 1990; Body Type: Cabriolet; Total Mileage: 74000;

Leaking coolant and cant find from where radiator and fittings without leaks,heater hoses fine,so jacked up and put on jack stands. With engine running and me on my back underneath I can see coolant coming from a hole in the torque tube tunnel about 14 inches to the rear of the engine. Where the heck should I look for the source in this instance. If it is from the heater core shouldnt I have fluid in the front floorboard area? Any help would be appreciated