Starlet ’92: Thermostat changed, but…

I changed the thermostat yesterday with a 92 starlet, because the display did not come out of the quark. Success: Actually no one at all. The display still does not go beyond a quarter, but for that it is now smoking after the warm-up from the cooler (probably from the lid). I read here always from “installation position”. But what is the correct installation position? Since the old thermostat from d before I could look, I have now just inserted this moving pin from the front seen vertically upwards, in the hope that this should be the indicator for the top. Was that right? And what happens actually (or not) if you use the thermostat incorrectly? Besides, I wonder where the shut-off valve for the heating is sitting. This heats only when you push the lever GAAAAANZ to the right. If you even just a few millimeters after left, it blows cold again. For answers I would be grateful (even if today probably not so many will be here…), because the car should run again on Monday….. Cheers New Year, I just say 🙂 Greeting Turbo