Installing Bimetallic Sensor in Boiler: Location for Optimal Temperature & Pump Control

Hello. I bought a boiler controller which controls the pump and blower, the cable for the blower comes out of it, the cable for the temperature and the cable with a bimetallic sensor, previously I had a controller without this sensor only with a temperature sensor where I have a place on the stove to insert it into the hole. Now I have a wire with a bimetallic sensor. Where should I attach it? at the exit to the pipe to the riser from the stove? because I have no idea.

Hello, what does the manual say (it should be)?

Added after 37 [seconds]:

Or some driver symbol. Can you please?

This is a driver bought on the Allegro. There was nothing in the package except one card of guarantee, I'm not mistaken. Name Controller Scl-22b controller.

https://sterujemy.pl/pl/p/STEROWNIK-DO-PIECA-CO-POMPY-I-NADMUCHU-mod.-SCL-22B-PLYNNY-START/89 Here is the entire manual with description.

Ok. The sensor ended with an aluminum tube should be attached to the output pipe from the boiler. What do I have an entrance for such a sensor in the boiler and I put it there, and what about the biometallic sensor? just on the output pipe from the boiler what? I do not understand

It is a bimetallic sensor, i.e. at the outlet of the boiler