Confused about the wiring diagram on INKBIRD 1000F 12V

[redcore]

How to connect a ptc heater to a controller, so...​

the controller actually turns the heater ON and OFF when it reaches the desired temperature?
I need to keep stable 30 deg temp, but there is no relay switch on the heater (I think that's how it is called), so if the heater is connected directly to a power supply, it just keeps feeding the heater with the power and the temp just goes up and up. And when I wire two heater's cables to a "heating" slots, the heater never turns on. That wiring diagram just confuses the cr*p out of me.
What am I missing here please?
Thanks in advance!

My power supply output is 12V, 360W max, 30A max.
The heater's specs: 150W, 15A.

Can I use that 15A heater with this temp controller? I see 10A on its diagram.

First pic - assembled heater
Second pic - heater taken apart, fan not in picture.

 

[sxdave]

To the question you ask at the end of your post I would say no. Your observation about the current ratings says 'no'.