1972 911 T MFI SSI Question: Hot/Cold Air Regulator Missing

[IAN]

My sister purchased a pretty nice 1972 911 T 2.4 MFI car.

I went and checked it out.

It was missing the hot/cold air regulator. I was wondering where that heater hose goes with SSI's? there is no place on the SSI to have the heater hose. She has the hot/cold regulator part but it is not installed. The car is currently very very hard to start.

Any thoughts?

Thanks.