Thermostat side port

[Daniel306 12 1 Cars]

Where dose this port on the side of the thermostat normally go? Mine has a Tee into the matrix pipe

[karabas 21]

I have LHD and its connected heater matrix directly. And also pic shows no branch.

Where is the other end connected?

[welshpug 1,661]

RHD is the same, earlier cars had a separate block which had the SAD bolted to it and the coolant temperature sender, which used a short ? shaped hose, later cars had the SAD bolted direct to the thermostat housing with the sender screwed into the rear of the housing, and the hose as pictured above.